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Old April 9th, 2012, 10:17 AM   #1 (permalink)
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Default External portable chargers

External batteries. Since the new EVO 4G LTE will not have a removable battery I'm wondering what external portable chargers people are using?

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Old April 9th, 2012, 10:31 AM   #2 (permalink)
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I use the Motorola Universal Dual-Charging Portable Power Pack (Black, Retail Packaging) for my OG Evo from time to time....

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Old April 9th, 2012, 10:54 AM   #3 (permalink)
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I used an 8000 mah Energizer one. Plus I have a couple smaller Duracell ones I got cheap on Woot.com. The nice thing about getting one of these versus an extra phone battery is one, you don't have to reboot your phone. Two, you can use these for anything else that uses USB to charge. For instance I use this to charge my bluetooth headset and also to charge my tablet. This one is big enough that it will even run my laptop. It comes with a lot of connections and cables.
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Old April 9th, 2012, 11:31 AM   #4 (permalink)
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Originally Posted by NicksGarage View Post
I used an 8000 mah Energizer one. Plus I have a couple smaller Duracell ones I got cheap on Woot.com. The nice thing about getting one of these versus an extra phone battery is one, you don't have to reboot your phone. Two, you can use these for anything else that uses USB to charge. For instance I use this to charge my bluetooth headset and also to charge my tablet. This one is big enough that it will even run my laptop. It comes with a lot of connections and cables.
Wow...what is that a generator! lol! I have that motorola pack for size related purposes, and what the size of that incredible hulk? How long would you say it take to charge your phone!?
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Old April 9th, 2012, 11:54 AM   #5 (permalink)
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Wow...what is that a generator! lol! I have that motorola pack for size related purposes, and what the size of that incredible hulk? How long would you say it take to charge your phone!?
Here's a picture of it next to my EVO. It's about twice as thick as a naked EVO. If I need to use it while using the phone I just put it in my pocket and plug in the USB cable. Or put it in my backpack. Just depends on what I'm doing. I don't rememember how long it takes to charge the phone from dead as I usually don't let it get dead but it will charge the phone at least 3 times.
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Old April 9th, 2012, 01:37 PM   #6 (permalink)
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Does anyone have any input on the charging speeds of these batteries?

Not all a/c chargers are made equal and some support higher currents (aka much faster charging) than others. Currently my Evo 3D is most happy at 1.5 A or 2 A chargers -- does anyone know what the current draw limits/specs are for these batteries?
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Old April 9th, 2012, 02:48 PM   #7 (permalink)
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Originally Posted by NeoteriX View Post
Does anyone have any input on the charging speeds of these batteries?

Not all a/c chargers are made equal and some support higher currents (aka much faster charging) than others. Currently my Evo 3D is most happy at 1.5 A or 2 A chargers -- does anyone know what the current draw limits/specs are for these batteries?
On the back of my Energizer 8000 it says the output for the USB is 1000mA.

With my OG EVO I've used it while using GPS navigation with the screen on and it was able to charge faster than the phone depleted. With my EVO View tablet it can't keep up with the device just using apps or the browser. Definitely slows down the discharge rate but even a regular USB cable connected to a computer won't do any better.
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Old April 9th, 2012, 03:24 PM   #8 (permalink)
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Does anyone have any input on the charging speeds of these batteries?

Not all a/c chargers are made equal and some support higher currents (aka much faster charging) than others. Currently my Evo 3D is most happy at 1.5 A or 2 A chargers -- does anyone know what the current draw limits/specs are for these batteries?
I'm surprised that a 3D can draw more than an amp. I don't think that I knew that.
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Old April 9th, 2012, 05:25 PM   #9 (permalink)
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I found one on eBay lats year that is 5000 Maahs I think. Its not very big. It fits in my pocket easile and came with a bunch of different plug ends.
I don't use it very often but with the evolte I think it will come in handy. With the loss figured in it would probably come close to charging the phone twice. Between that and a car charger I'm not worried about it.


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Old April 9th, 2012, 06:11 PM   #10 (permalink)
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I'm surprised that a 3D can draw more than an amp. I don't think that I knew that.
I'll have to post the battery charge curves of my Evo 3D on different sources some time. There's most definitely a measurable difference in the slopes. Strangely, I've observed that the fastest charging doesn't come from the 2 A rated charger (from the Palm Pre, it needed a higher current charger to overcome some of the inefficiencies of the inductive charging), but a 1.something rated charger (from my old Moto WinMo 6.1 Q9C, that outputs to MiniUSB but I have rigged to a MicroUSB adapter).
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Old April 9th, 2012, 11:35 PM   #11 (permalink)
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Originally Posted by NeoteriX View Post
Does anyone have any input on the charging speeds of these batteries?

Not all a/c chargers are made equal and some support higher currents (aka much faster charging) than others. Currently my Evo 3D is most happy at 1.5 A or 2 A chargers -- does anyone know what the current draw limits/specs are for these batteries?
I thought I read a long time ago that the phone limits the draw to 1.5A. If the charger can deliver more than 1A, the phone is in A/C charging mode, denoted by the OS.

When plugged into a USB port, which delivers 500mA max, the OS denotes it as USB charging mode. Any charger rated for under 1A will also show in the OS as USB charging mode, even if the charger is plugged into a wall socket.

The phone limits the max rate of charge for safety reasons. The higher the amperage, the faster the battery can potentially charge. The side effect is the temp of the battery gets higher. Li-Ion does not do very well at high temps. It can cause plating, which means your max capacity diminishes. Worst case, you get thermal runaway, which leads to an explosion.

Standard Li-ion charging best practice is 'easy does it.' You can extend the life of the battery by charging slowly, not keeping it fully charged for long periods, and keeping the temperature down. A lot of this is irrelevant to cell phones, since we tend to replace them before we notice the damage to the battery. But for laptop battery maintenance, this stuff is really important.
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Old April 9th, 2012, 11:38 PM   #12 (permalink)
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Also, the phone draws the current from the charger. The charger can't force current into the phone. Meaning, if you have a theoretical 5A charger, if the phone is only designed to draw 1.5A, you charge at 1.5A.

So why get a 2A charger? If it supports multiple phones, each phone can get a full amp. A 1.5A charger with 2 phones charging means each phone only gets 750mA and will therefore charge slower than with the 2A charger.
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Old April 10th, 2012, 12:41 AM   #13 (permalink)
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Also, the phone draws the current from the charger. The charger can't force current into the phone. Meaning, if you have a theoretical 5A charger, if the phone is only designed to draw 1.5A, you charge at 1.5A.

So why get a 2A charger? If it supports multiple phones, each phone can get a full amp. A 1.5A charger with 2 phones charging means each phone only gets 750mA and will therefore charge slower than with the 2A charger.
and this boys and girls is how electricity works!

current is the most important thing when charging if your concerned about speed of charge.
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Old April 16th, 2012, 11:43 AM   #14 (permalink)
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I bought this dual port 5000mAh 5V external charger a few days ago for $25.95 and free shipping (after using promo code 16IMP50D). One port is 1A, and the other port is 500mAh. It's supposed to be delivered today, I'll keep you all posted.
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Old April 16th, 2012, 12:33 PM   #15 (permalink)
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how is 1.5Ah total = 5Ah or is that the rate that the device charges at? if so thats a nice little toy
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Old April 16th, 2012, 12:40 PM   #16 (permalink)
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mAh refers to the capacity of the battery. In this case, that product came with an external battery with a 5000mAh capacity.

The charger has two ports: one of them can deliver a full amp of charge (which to the Android OS means fast, A/C mode charging). The other port is a half-amp charge, which is equivalent to the current available from a standard computer USB jack. That naturally charges slower, and Android will indicate USB mode charging.

The charger draws 1.5A from whatever it's plugged into.

At 1A charging current, a 5000mAh (5Ah) battery will take 5 hours to charge under ideal conditions.
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Old April 16th, 2012, 05:23 PM   #17 (permalink)
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Well, it's been charging for about an hour now. Just from first impressions, it's comparable in size to my original evo. It's pretty much the same width, maybe about 33% thicker, but also about a half inch shorter. I'll measure the charger once it comes off the charger .

One strange thing though, it didn't come with a converter to plug it into the wall! It came with exactly what is pictured on amazon... which I did not notice was lacking the USB-to-AC converter (luckily I have about 3 HTCs from my Evo, my wife's old Shift, and her current Evo)!
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Old April 16th, 2012, 08:05 PM   #18 (permalink)
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i think they are assuming you have a wall charger since your using it to charge the same port type that it takes in.. cutting out on cost by providing a redundant piece
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Old April 17th, 2012, 08:43 AM   #19 (permalink)
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Quote:
Originally Posted by CriticalCritic View Post
I bought this dual port 5000mAh 5V external charger a few days ago for $25.95 and free shipping (after using promo code 16IMP50D). One port is 1A, and the other port is 500mAh. It's supposed to be delivered today, I'll keep you all posted.
Update:
Preliminary testing of this charger is mixed. It seems to be acting a little funny when I tried to charge my Evo 4G using the included micro-USB cable plugged into the 1A output. My phone was showing that it was charging before I even turned on the charger. But it didn't seem to be really charging. Maybe I didn't accurately record the starting bat%.

So I changed to my HTC cable to connect to the 1A output. Now my phone thinks that it's connected to something less than a 1A output (I know this because Tasker set to change homescreen when connected to a weaker charging current). But it has been steadily charging and is now fully charged (I only started at 89% charge). I'll do some more in depth tests over the next few days.
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Old April 17th, 2012, 03:18 PM   #20 (permalink)
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Some 1A or higher chargers have pins in the USB female side that can prevent the device from getting the full current. This is the biggest problem in shopping for chargers.

Side note: my first post ever on these forums was to ask someone if they knew of a high-amp charger that would work with the Evo 4G. Being the noob I was, I posted in the HTC Incredible forums.

Anyway... I bought a 1.5A Belkin charger. It was advertised for the iPhone, but I assumed it would work with my Evo since it's just a USB-A female port. Unfortunately, it's pinned to make the iPhone charge fast, but apparently that pin config could only slow-charge my Evo.

Current on the charger is NOT the only variable to charge rate, unfortunately.
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Old April 17th, 2012, 03:19 PM   #21 (permalink)
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You can use an app called Current Widget to see how fast the phone is charging (or draining during use).
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Old April 18th, 2012, 07:26 PM   #22 (permalink)
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I've had my kinsington charger since my EVO 2 years ago. Works great.
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Old May 21st, 2012, 12:45 PM   #23 (permalink)
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I've been thinking about getting this. I know we don't know about the battery yet but I've been looking at chargers and I found one for 19.99 on Amazon that someone on here posted about and then a friend send me this one and said it will charge faster cause it's 1A and it has a 5200 mah and it's only like 30 bucks.

Amazon.com: PowerGen External Battery Pack 5200mAh High Capacity Power Bank Charger 1A output for Apple iPad 2, iPhone 4 4s 3Gs 3G, iPod Touch / Samsung Galaxy S S2 S II, Galaxy Nexus, Epic 4G / Blackberry Torch Bold Curve / HTC Sensation 4G, XE, XL,
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Old May 21st, 2012, 01:52 PM   #24 (permalink)
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looks like a good emergency pack.

ive been reading the comments on the pack and the company who produces this gadget was responding to questions.


here is an excerpt from the company on the charging capacity of the pack:

Quote:
The charger has a 70 to 80% efficiency depends on the quality of the USB cable used and the efficiency of phone's circuit. Please refer to the technical detail, we have listed the battery pack will charge the iphone 4 twice (an iphone 4 has a battery capacity of 1450mAh). It is easy to find similar complains on other battery packs on Amazon.

Before the power goes into the battery, there are two conversion involved.
First: From 3.7v battery to USB voltage 5.3v
Second: From 5.3v USB voltage to 4.2v Li-ion charging voltage.
Every conversion loses power. Also, the circuit has IC regulate the whole process which consumes power. That's why there is no 100% efficiency, 100% efficiency is always not possible in the real world.

A typical power pack of 5000mAh has a output of 3000 to 3300mAh. Just as other battery packs, it was labeled as the raw cell capacity.

If you email us I can send you a picture showing its inside structure with cells model, you can find the cell capacity information from Google.
BTW, MintyBoost site by LadyAda has a guide explaining the inefficiency of emergency charger.

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Old May 23rd, 2012, 03:34 PM   #25 (permalink)
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Default grabbed an 11000mah portable charger

overkill but it can charge my PS Vita, bt phones also. its 3 usb ports, one port offering up to 2.2 mah.



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Old May 23rd, 2012, 03:39 PM   #26 (permalink)
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Doomsday Preppers: Sony Introduces 4,000mAh Hand-Cranked Portable Battery

Something for everyone!
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Old May 23rd, 2012, 03:42 PM   #27 (permalink)
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overkill but it can charge my PS Vita also. its 3 usb ports, one port offering up to 2.2 mah.
There's no such thing as overkill when it comes to batteries! A couple more of those bad boys and we'll be able to go..... BACK TO THE FUTURE without lightening.

p.s. You left out a zero in your post title. I was very underwhelmed at first
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Old May 23rd, 2012, 06:34 PM   #28 (permalink)
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I was on Amazon looking at the one I posted above and at the bottom it said you may be interested in one of these and it showed 8400 one's. I was looking at 5200 I think or 5600. Now I don't know which to get. I do know I need 1A and I'm willing to spend thirty forty bucks. One guys review said he had one by a company new Trent also that was great. The few I've looked out all had good reviews.
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Old May 24th, 2012, 01:24 AM   #29 (permalink)
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I wonder if anyone will make a battery case for the phone. To me that would be more useful than an external battery.
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Old May 24th, 2012, 02:05 AM   #30 (permalink)
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I wonder if anyone will make a battery case for the phone. To me that would be more useful than an external battery.
I'd like it to be these guys.

PowerSkin Battery Cases | PowerSkin

I've been meaning to write them to learn their plans, just too busy lately.

I do wonder, with the speaker at the bottom and the kickstand in the middle, how much they could do with the space available though.
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Old May 24th, 2012, 02:33 AM   #31 (permalink)
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I'd be willing to lose temporary use of the kickstand for a battery case. I'd only be using it for all-day events like conventions or concert festivals and the like, where the need for the kickstand will be nil.

I'm sending an email to them now asking if they're planning on making one for the LTEvo.
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Old May 24th, 2012, 07:46 AM   #32 (permalink)
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Being that I'm going to have a long travel for my vacation this summer, I'm probably going to need an external battery. Unless Amtrak has wall sockets by the passenger seats?
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Old May 24th, 2012, 08:11 AM   #33 (permalink)
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Being that I'm going to have a long travel for my vacation this summer, I'm probably going to need an external battery. Unless Amtrak has wall sockets by the passenger seats?
The Amtrak trains I've been on in the NorthEast Corridor route (NYC > DC), have had outlets, although I think it may vary by car. The Acela definitely does, and I believe Business Class on the regular train does. The coach car might, this one I'm not as sure of.
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Old May 24th, 2012, 09:07 AM   #34 (permalink)
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The Goal Zero Guide 10 Plus works fantastic, and I can recharge it with my solar panel. What's great, is that you can charge 4 batteries, swap em out and charge more if needed.

Amazon.com: Goal Zero Guide 10 Plus: Everything Else
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Old May 26th, 2012, 05:01 PM   #35 (permalink)
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I just ordered this one. Dude does a pretty good video review in comments/review section.

http://www.amazon.com/Anker-5600mAh-External-Flashlight-Motorola/dp/B005K7192G/ref=sr_1_1?ie=UTF8&qid=1338069632&sr=8-1
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Old May 27th, 2012, 01:51 AM   #36 (permalink)
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Long times ago I purchased the 'JustMobile Gum Pro' (4400mAh battery pack) as mobile charger for my HTC Desire.

Now I use the JustMobile for my HTC One X
... on both phones with a standard microUSB cable, no need for special cables with adapters

Harry
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Old May 27th, 2012, 09:28 AM   #37 (permalink)
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So do they make any with the usb attached where you can just plug it into the computer and not worry about carrying the battery thing and the cable? The guy I go out with is buying us both one cause I won him this 69.95 Seidio Convert Combo case and holster thing and he had one for his 3D and absolutely loved it.

But he said he didn't want to have to carry around a little box and cable both in fear of losing the cable if he didn't have too. He said he was going to search to see if they made one with the cable attached.But I thought I would ask here. I looked at a couple not too long ago on Amazon but the cable wasn't attached don't even know if there made like that but I found like a 3300 or 4400 one then I found a good 5200 one for like 33 bucks I think. It said if you like this you'll like and they showed 8400 ones for like 40 something but I don't need one that high I don't think. I just want something that will charge my phone 2 maybe 3 times max like if I am somewhere out of town and out all day. I hope I don't have to use it much. I am always near a plug and got 12 hours of juice yesterday before I had to charge. If our battery is 2000 does the 4400 one mean it will charge your phone twice and like the 8400 one mean 4 times?

Anyway I was wondering if they do make one with the cable attached and if not I don't care. This Power Mat charger I used to have came with a small cable like the one that came with one of my old bluetooth headsets so I would have extras in case we lost them. But the couple I looked at on Amazon had good reviews. I just wanted recommendations of one from people here and I will check into 'JustMobile Gum Pro' I'm gonna google it. Thanks! The I had one on Amazon I had been looking at 5200 amh for like 33 bucks and I closed out my browser by accident and lost all my open tabs.
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Old May 27th, 2012, 01:43 PM   #38 (permalink)
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Found something, but I don't know if it's be real ...

"This charger connects your phone to a wall power outlet for simultaneous talk and charge. Features a high-capacity internal battery for charging while on the go.

*1800mAh Lithium Polymer Internal Battery
*Built-in Micro-USB Cable and USB port"


http://schwops.co.uk/item.php?ptitle=sprint%20travel%20charger%20plus%2 0battery%20charger%20on%20the%20go%20for%20sprint% 20phone%20pgu3939v&pcat=-batteries&eid=370596236073

... and the battery capacity is very small.

Harry
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Old May 27th, 2012, 04:06 PM   #39 (permalink)
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right that battery capacity would barely give the evo a full charge. not worth it. its designed more for iphones and other mobile devices with smaller battery capacities...
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Old May 27th, 2012, 04:37 PM   #40 (permalink)
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Yes, with a 6000mAh battery it would be an interesting device with its build-in wall power plug and its build-in microUSB connector.

No worry to lose cables

Harry
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Old May 27th, 2012, 05:21 PM   #41 (permalink)
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Quote:
Originally Posted by EarlyMon View Post
I'd like it to be these guys.

PowerSkin Battery Cases | PowerSkin

I've been meaning to write them to learn their plans, just too busy lately.

I do wonder, with the speaker at the bottom and the kickstand in the middle, how much they could do with the space available though.
I had the power skin with my Htc Inspire and loved it, it was the best i would get the battery to last all day no matter what i did to it! I dont care if they dont have a kickstand opening on it i would still buy it because i know they work well!
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Old May 27th, 2012, 05:25 PM   #42 (permalink)
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Quote:
Originally Posted by Sauske View Post
I use the Motorola Universal Dual-Charging Portable Power Pack (Black, Retail Packaging) for my OG Evo from time to time....

I was just looking into this does it work well and does it charge fast?
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Old May 27th, 2012, 05:35 PM   #43 (permalink)
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Can someone recommend one that has a 12V output as well to power the Xoom? We're leaving for Europe for a 2 week jaunt and I want to make sure I have enough battery for the long flights
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Old May 29th, 2012, 10:08 AM   #44 (permalink)
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Quote:
Originally Posted by EarlyMon View Post
I'd like it to be these guys.

PowerSkin Battery Cases | PowerSkin

I've been meaning to write them to learn their plans, just too busy lately.

I do wonder, with the speaker at the bottom and the kickstand in the middle, how much they could do with the space available though.
Quote:
Originally Posted by suprmallet View Post
I'd be willing to lose temporary use of the kickstand for a battery case. I'd only be using it for all-day events like conventions or concert festivals and the like, where the need for the kickstand will be nil.

I'm sending an email to them now asking if they're planning on making one for the LTEvo.
Received a reply:

"Regret that EVO 4G LTE is currently not on our current product road map. If there is any chance we are developing PowerSkin for the phone, we would be glad to keep you updated.

Instead of PowerSkin, may we recommend you Energi To Go universal serial charger?
Although they are not docking charger type, the changeable tip design will allow users to use the power pack support different device. For mobile phones, we will recommend XP2000"

Of course, that could just be a form response. Seems like they'd be losing out on good money not releasing a battery case for a popular phone that has no removable battery.
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Old June 2nd, 2012, 11:53 PM   #45 (permalink)
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Quote:
Originally Posted by jcommerce View Post
I just ordered this one. Dude does a pretty good video review in comments/review section.

http://www.amazon.com/Anker-5600mAh-External-Flashlight-Motorola/dp/B005K7192G/ref=sr_1_1?ie=UTF8&qid=1338069632&sr=8-1
Got this in the mail on Thursday and played around with it for a bit. I'm digging it so far. Nice, compact, solidly built. Comes with a good array of connectors too. I'll try to do a full charge on the LTEVO and post how long it takes...but so far, thumbs up!
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Old June 3rd, 2012, 12:26 AM   #46 (permalink)
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Quote:
Originally Posted by jcommerce View Post
Got this in the mail on Thursday and played around with it for a bit. I'm digging it so far. Nice, compact, solidly built. Comes with a good array of connectors too. I'll try to do a full charge on the LTEVO and post how long it takes...but so far, thumbs up!
It's a good charger. I think the Anker is just a name brand that uses the same package as other packs on Amazon like the Powergen (just a guess). Anyway, I have used the older version Powergen 4400mah and Anker 8400mah dual usb packs and both are great. Usually on Amazon, the retailer of the Anker has a sale where if you buy 2 models, they give a discount.

The Anker 8400 is a dual usb charger, 600mah and 2ah output. The 5600 Anker I think uses a 1ah output so it mostly works for phones. I think some tablets require at least 2ah.
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Old June 3rd, 2012, 02:08 AM   #47 (permalink)
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So the Anker 5600 is a good one to buy. I need one like now. My phone died on me tonight while out. I need a good one that will charge kind of quick and let me use it while charging if I have too. How long does it usually take to charge your phone back up? I would say if I am down to like 25% just to get me back to 50 would be good enough for me. But tonight the signal sucked where I was and I had auto sync on and it died by around midnight or a little later and was on 90 something at 7pm. My friend is buying one of these too so will we get a discount for buying two? And the 8400 one does that mean it will charge faster or that it can just charge your phone more times? Thanks!

Quote:
Originally Posted by wonton2049 View Post
It's a good charger. I think the Anker is just a name brand that uses the same package as other packs on Amazon like the Powergen (just a guess). Anyway, I have used the older version Powergen 4400mah and Anker 8400mah dual usb packs and both are great. Usually on Amazon, the retailer of the Anker has a sale where if you buy 2 models, they give a discount.

The Anker 8400 is a dual usb charger, 600mah and 2ah output. The 5600 Anker I think uses a 1ah output so it mostly works for phones. I think some tablets require at least 2ah.
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Old June 3rd, 2012, 02:21 AM   #48 (permalink)
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The Anker's chargers will charge your phone as fast the wall charger which came with the phone ... if you use that cable which comes with the Anker's
I use the Anker 5600 with my One X.

5600 and 8400 are mAh, the capacity of the Anker charger's battery.
So, the 8400 will charging your phone more times as the 5600
Should do it about three times fom 20% to 100%

Harry
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Old June 3rd, 2012, 09:51 AM   #49 (permalink)
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I went out all day yesterday to Balboa Park in San Diego, and I knew that my EVO would not last all day since it was gonna be my main camera.

I looked on the web for a couple days, and decided to order the incredicharge 11,000 battery. Amazon.com: Incredicharge I-11000 External Battery Pack and Charger 11000mAh Capacity for iPad2, iPad 3, HP Touchpad iPhone 4 4s 3Gs 3G, iPod Touch, Samsung Galaxy Note S S2, HTC Sensation Evo Thunderbolt Blackberry, Droid X Razr Maxx, Nintendo, Sony

The charger has 3 outputs. 2 USB at 800ma, and one at 2 amps. I used the 800 one, and the EVO saw it as AC power, so that was good for me.

Yesterday, I took about 200 pics, along with using the phone for Facebook and instagram.

I topped up my phone from ~60% to ~90% 2-3 times, and at the end of the day the incredicharge still displayed 87% remaining!

Overall, I really recommend this charger. It's kinda expensive from amazon right now, but it's gone as low as $40. I would use camelcamelcamel to set up an alert for when the price goes below whatever you pick.
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Old June 3rd, 2012, 10:52 AM   #50 (permalink)
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i mentioned earlier in this thread i also picked up the incredicharge 1100mah unit. it has charged everything ive plugged into it. BT phones, lte evo, ps vita. charges the phone using AC charging and not USB charging (included charge cable) swiftly. recommended for sure.
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HTC EVO 4G LTE
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The HTC EVO 4G LTE is Sprint's version of the HTC One X. It comes with all the same specs, except for the processor, internal storage and radios (includes LTE). And aesthetics are also significantly different. While many users have complaine... Read More

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