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View Poll Results: What voltage is specified on your Rezound Battery?
3.7VDC 22 47.83%
3.8VDC 24 52.17%
Voters: 46. You may not vote on this poll

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Old November 21st, 2011, 10:14 AM   #1 (permalink)
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Default Is your Rezound Batt 3.7V or 3.8V?

I just ordered a few HTC Thunderbolt batteries for my Rezound, but have been reading quite a bit about a discrepancy. The TBolt batt is 3.7V and Rezounds seem to have shipped with either a 3.7v or 3.8v. Pull your batt and let us know which yours shipped with.

Mine:

Some others (Thunderbolt on left, Rezound on right):

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Old November 21st, 2011, 10:25 AM   #2 (permalink)
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Thunderbolt batteries will cause the Rezound to throw an error. It may not be an immediate issue, but you're powering a dual-core over a single core. I'm not sure I'd take a chance with the Thunderbolt battery inside the Rezound.
 
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Old November 21st, 2011, 10:29 AM   #3 (permalink)
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Quote:
Originally Posted by SamXp View Post
I just ordered a few HTC Thunderbolt batteries for my Rezound, but have been reading quite a bit about a discrepancy. The TBolt batt is 3.7V and Rezounds seem to have shipped with either a 3.7v or 3.8v. Pull your batt and let us know which yours shipped with.

Mine:

Some others (Thunderbolt on left, Rezound on right):

Mine is 3.7V
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Old November 21st, 2011, 10:32 AM   #4 (permalink)
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Mine is 3.7V


Your Rezound's battery is 3.7? Is it red? If so, I'm surprised it didn't throw an error message on the notification bar.
 
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Old November 21st, 2011, 10:35 AM   #5 (permalink)
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Quote:
Originally Posted by TxGoat View Post
Your Rezound's battery is 3.7? Is it red? If so, I'm surprised it didn't throw an error message on the notification bar.
Yup... Red.... battery that came right out of the box when I got the phone on Thursday.
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Old November 21st, 2011, 10:46 AM   #6 (permalink)
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Quote:
Originally Posted by TxGoat View Post
Thunderbolt batteries will cause the Rezound to throw an error. It may not be an immediate issue, but you're powering a dual-core over a single core. I'm not sure I'd take a chance with the Thunderbolt battery inside the Rezound.
That's not a scientific statement. Some have experienced errors that they attribute to using a Thunderbolt battery in a Rezound. Some have used them with no issues. Correlation is not causation.
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Old November 21st, 2011, 11:05 AM   #7 (permalink)
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Default Mine is a 3.7, does that mean I can't use a 3.8?

Is the extended battery (2750 mah) a 3.7 or 3.8V. Since mine is a 3.7v, does this mean I can use the Tbolt battery? Will one voltage last longer than the other?
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Old November 21st, 2011, 11:06 AM   #8 (permalink)
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Mine is 3.7. That's weird that there is two different ones.
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Old November 21st, 2011, 11:06 AM   #9 (permalink)
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That's not a scientific statement. Some have experienced errors that they attribute to using a Thunderbolt battery in a Rezound. Some have used them with no issues. Correlation is not causation.

Well excuse me for not dawning my labcoat... Based on a user that stated he threw a Thunderbolt battery into his Rezound and immediately received a warning on his notification bar, I wouldn't throw a Thunderbolt battery into the Rezound. At the risk of not sounding "scientific enough", I would ask you why HTC would make a battery rated at 3.8V for the Rezound if they thought they could just slap in the 3.7V in the Rezound without issue? It seems that if HTC was comfortable enough with the 3.8 and 3.7 being interchangeable from an engineering standpoint that they'd just release the Rezound with the 3.7 battery since it would streamline manufacturing costs of the battery.

VTENGR, you wouldn't mind taking a pic of the red battery with the 3.7V rating would you? Seems like either they ran short on supply of the 3.8V battery and just started packaging the phone with the 3.7V or maybe your phone was one that was subject of HTC's quality control issues. I'm curious either way.
 
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Old November 21st, 2011, 11:14 AM   #10 (permalink)
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Quote:
Originally Posted by TxGoat View Post
Well excuse me for not dawning my labcoat... Based on a user that stated he threw a Thunderbolt battery into his Rezound and immediately received a warning on his notification bar, I wouldn't throw a Thunderbolt battery into the Rezound. At the risk of not sounding "scientific enough", I would ask you why HTC would make a battery rated at 3.8V for the Rezound if they thought they could just slap in the 3.7V in the Rezound without issue? It seems that if HTC was comfortable enough with the 3.8 and 3.7 being interchangeable from an engineering standpoint that they'd just release the Rezound with the 3.7 battery since it would streamline manufacturing costs of the battery.

VTENGR, you wouldn't mind taking a pic of the red battery with the 3.7V rating would you? Seems like either they ran short on supply of the 3.8V battery and just started packaging the phone with the 3.7V or maybe your phone was one that was subject of HTC's quality control issues. I'm curious either way.
Don't mind taking a pic but my phone is my only camera so I'm not sure how I'm gonna do it.
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Old November 21st, 2011, 11:20 AM   #11 (permalink)
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Quote:
Originally Posted by TxGoat View Post
Well excuse me for not dawning my labcoat... Based on a user that stated he threw a Thunderbolt battery into his Rezound and immediately received a warning on his notification bar, I wouldn't throw a Thunderbolt battery into the Rezound. At the risk of not sounding "scientific enough", I would ask you why HTC would make a battery rated at 3.8V for the Rezound if they thought they could just slap in the 3.7V in the Rezound without issue? It seems that if HTC was comfortable enough with the 3.8 and 3.7 being interchangeable from an engineering standpoint that they'd just release the Rezound with the 3.7 battery since it would streamline manufacturing costs of the battery.

VTENGR, you wouldn't mind taking a pic of the red battery with the 3.7V rating would you? Seems like either they ran short on supply of the 3.8V battery and just started packaging the phone with the 3.7V or maybe your phone was one that was subject of HTC's quality control issues. I'm curious either way.
Just don't make it a habit! :P
Seriously, though - there's nothing wrong with speculation or opinion. I just tend to be careful about stating it as such (engineer in my day job when I'm not geeking out over Android phones).
My speculation on the voltage difference is that the Rezound 1.5GHz CPU could benefit from the slight increase in voltage, and that they are phasing in the higher voltage, but didn't have time to ensure they could purge inventory of 3.7V batts before launch.

If they're shipping 3.7V Rezounds, though, then there isn't a reason the Thunderbolt batt should throw an error, unless there is some identification circuitry. This has never been the case previously with hTC phones so its not likely - but certainly possible.
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Old November 21st, 2011, 12:05 PM   #12 (permalink)
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Quote:
Originally Posted by TxGoat View Post
Well excuse me for not dawning my labcoat... Based on a user that stated he threw a Thunderbolt battery into his Rezound and immediately received a warning on his notification bar, I wouldn't throw a Thunderbolt battery into the Rezound. At the risk of not sounding "scientific enough", I would ask you why HTC would make a battery rated at 3.8V for the Rezound if they thought they could just slap in the 3.7V in the Rezound without issue? It seems that if HTC was comfortable enough with the 3.8 and 3.7 being interchangeable from an engineering standpoint that they'd just release the Rezound with the 3.7 battery since it would streamline manufacturing costs of the battery.

VTENGR, you wouldn't mind taking a pic of the red battery with the 3.7V rating would you? Seems like either they ran short on supply of the 3.8V battery and just started packaging the phone with the 3.7V or maybe your phone was one that was subject of HTC's quality control issues. I'm curious either way.


Only thing i see different from the 3.7 to the 3.8 is that the part number ends in -03M instead of -02M
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Old November 21st, 2011, 12:22 PM   #13 (permalink)
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Interesting that the 3.8 seems to be an older revision. I wonder if its the other way around and they thought they needed 3.8 and later discovered 3.7 would do (and likely decrease power consumption)

Several users seem to have had no issues with Thunderbolt batts in their Rezound in this thread:
Looking for a Rezound owner w/a thunderbolt - Page 2 - xda-developers
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Old November 21st, 2011, 12:40 PM   #14 (permalink)
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3.8 in mine. Weird
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Old November 21st, 2011, 02:48 PM   #15 (permalink)
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3.7 in mine as well, so now the question is which can use the thunderbolt battery swithout error. The stock 3.7 or 3.8 users.
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Old November 21st, 2011, 03:08 PM   #16 (permalink)
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Quote:
Originally Posted by SamXp View Post
Just don't make it a habit! :P
Seriously, though - there's nothing wrong with speculation or opinion. I just tend to be careful about stating it as such (engineer in my day job when I'm not geeking out over Android phones).
My speculation on the voltage difference is that the Rezound 1.5GHz CPU could benefit from the slight increase in voltage, and that they are phasing in the higher voltage, but didn't have time to ensure they could purge inventory of 3.7V batts before launch.

If they're shipping 3.7V Rezounds, though, then there isn't a reason the Thunderbolt batt should throw an error, unless there is some identification circuitry. This has never been the case previously with hTC phones so its not likely - but certainly possible.


When I ordered my Rezound spare battery back about a month and a half ago, it came with the same 3.8 voltage so I'm not so sure about phasing in a higher battery. If anything you'd think that it would be the opposite (you'd think a spare battery ordered a month ago would be the 3.7). An interesting test would be to see what everyone's build date or purchase date was on the phone. Maybe the date stamped on the back of the battery cover is the manufacture date. I have 110927 stamped on the inside of the phone (red plastic), and 20110915 on the back battery plate. Considering these phones aren't exactly manufactured in the U.S. it's probably a manufacture date of Sept '11. Anyone with a 3.7 red battery show anything other than 09/11 as a possible manufacture date?
 
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Old November 21st, 2011, 03:15 PM   #17 (permalink)
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I have the "red" 3.7V - I found this interesting. It was reading 3.79-3.8 VDC

Note: this is not a cheap hardware store multimeter.
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Old November 21st, 2011, 03:17 PM   #18 (permalink)
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h,mm, 3.7 launch day rezound here.
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Old November 21st, 2011, 03:33 PM   #19 (permalink)
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h,mm, 3.7 launch day rezound here.


What's the build date though inside your cover? I think since the Rezound has only been out 1 week (unless you were one of the lucky ones to get it 2 Thursdays ago) you won't be able to really tell if your phone was an early build or not.


Here's the link to the discussion about the battery error.

.:Official Review And Impressions Thread:.

From http://androidforums.com/htc-rezound/444719-official-review-initial-impressions-thread-7.html




Who knows maybe they tweaked the final release so that it was ok with both batteries. Would make sense since you have 2 phones that take the same batteries, might as well make both batteries available to both devices to limit confusion.
 
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Old November 21st, 2011, 04:07 PM   #20 (permalink)
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3.7 here.

Build dates:
WNC 09/14
VH 09/18
WTD 09/22
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Old November 21st, 2011, 09:05 PM   #21 (permalink)
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3.7 here, mine was BEFORE launch day.
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Old November 21st, 2011, 09:42 PM   #22 (permalink)
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3.8 for my 1620 battery will check the extended battery later. Bought this past Saturday.

Edit:
3.7 for 2750 battery bought same time from same Verizon corp store. Both batteries are red HTC batteries.

Original Cover
WNC 09/14
VH 9/19
WTC 9/24

Extended cover two dates
10/06 and 10/12
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Old November 21st, 2011, 09:51 PM   #23 (permalink)
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For the record, team 3.8 pwnz team 3.7's butt.....
 
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Old November 22nd, 2011, 06:13 AM   #24 (permalink)
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So I came home and decided to dawn my labcoat....

I pulled the battery in my phone which indeed is 3.8V but I also grabbed my "spare". Apparently I had the spare in the phone thus when I grabbed the 2nd battery, sure enough it said "3.7V", thus I want to retract my "team 3.8V" post above and need to amend my vote.

Also, I figured I'd go ahead and throw the Thunderbolt battery into the Rezound (I was still wearing my labcoat...DAMN YOU OP! ) Sure enough, the Rezound screamed like a little bish.... I took that thing out quick. Below are pics.

Oh and pay no mind to the 32 GB micro card. Apparently I got a pre-production prototype that had a 32 GB card. HTC put 16 GB in when they found out the Nexus was going to suck by having 16 GB sealed they downsized their offering. I'M SOOO FULL OF CRAP AREN'T I??






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Old November 22nd, 2011, 07:37 AM   #25 (permalink)
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Interesting results! Now I'm wondering if the [=!=] icon gets thrown when it notes a significant change in voltage. But you have a 3.8 that came with the phone and a spare 3.7 and neither of those throw an error but the Thunderbolt battery does. Puzzling.

My Anker 1700mAh 3.7v batteries are coming in today so we'll see what happens with those.
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Old November 22nd, 2011, 08:07 AM   #26 (permalink)
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3.7 here, got it on launch day
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Old November 22nd, 2011, 08:27 AM   #27 (permalink)
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I wonder how long it would take to get an answer from HTC telephone support about why they have two slightly different batteries for the Rezound. The first and second tier guesses would probably be amusing in case anyone is interested in trying. I would but I don't even have a Rezound.

I did however post a thread in their support forum, but that wouldn't be as much fun as calling customer support and listening to them make stuff up.

http://community.htc.com/na/htc-forums/android/f/176/p/14586/60611.aspx#60611
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Old November 22nd, 2011, 11:08 AM   #28 (permalink)
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Interesting results! Now I'm wondering if the [=!=] icon gets thrown when it notes a significant change in voltage. But you have a 3.8 that came with the phone and a spare 3.7 and neither of those throw an error but the Thunderbolt battery does. Puzzling.

My Anker 1700mAh 3.7v batteries are coming in today so we'll see what happens with those.


Well the Thunderbolt battery is rated a little lower. I am not going to try it here (so don't bother asking ) but I wonder if you were to reset the battery statistics if that would get rid of the error. I know that in the Thunderbolt forum they claim you have to reset the battery statistics when you throw in an extended battery so that the Thunderbolt reads it correctly. I'll let you put on your lab coat and try that when your Thunderbolt batteries arrive.



Oh and another thing I'll mention (an observation, not an experiment ) is today I popped in the 3.7V battery and I've noticed my 4G reception seems to be more consistent today and battery life appears to be a bit improved. IIRC though, yesterday with the 3.8V I had power mode set to "performance". I'll have to do more consistent testing though.
 
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Old November 22nd, 2011, 12:17 PM   #29 (permalink)
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How do you reset battery statistics? I tried going into recovery but I just get the Red Triangle with the exclamation point.

Anyway, the Anker batteries gave the same [=!=] battery icon and wouldn't even connect to the network. This Rezound takes batteries very seriously! It might not be a voltage thing. It really can't be. I just picked up a 3.7v Rezound spare battery. It could be current delivery, which really doesn't get specified by mAh, DVC or even W/hr (but sort of).

And the Anker wall charger is an asbsolutely pitiful piece of equipment. I'm returning the package and picking up one of these chargers:
http://www.amazon.com/gp/product/B004WA90IM/ref=oh_o00_s00_i00_details
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Old November 22nd, 2011, 01:18 PM   #30 (permalink)
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Those Chinese chargers usually work great but sometimes don't work at all. I have one now that charges a battery only to a certain point. If I then remove the battery and put it into my Seidio charger, it will charge for another 45 minutes or so. Still, it's worth it, considering the price. Just be prepared to check it out upon delivery.
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Old November 22nd, 2011, 01:42 PM   #31 (permalink)
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I bought a Chinese charge from ChiChiTec for my hTC EVO and it was great. It would charge to 100%. The charger in the EVO would go to 100%, then cut off, and it would drop to 90% as soon as I unplugged it. So my spare batteries in the Chinese chargers were the only ones with a full charge.
So glad the Rezound actually does a full charge when plugged in, though!
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Old November 22nd, 2011, 02:38 PM   #32 (permalink)
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3.8V launch day from local VZW corporate store here.
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Old November 22nd, 2011, 02:39 PM   #33 (permalink)
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How do you reset battery statistics? I tried going into recovery but I just get the Red Triangle with the exclamation point.


Hmmm, I figured the Rezound had the same HTC battery service that you could just open up and delete the data from (in the apps list). I can't find it anywhere. I know in the Thunderbolt forums they had people going to bigger batteries and getting the same error. I can't find the thread where it shows how they killed it, but I thought for sure it was inside the battery app. I'll have to do some more searching.
 
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Old November 22nd, 2011, 02:41 PM   #34 (permalink)
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BTW, I noticed that if I look at the original box the Rezound came in, there is a new sticker exactly covering up an old sticker that details software revision, MEID etc. This together with my 3.8V battery. Any of you 3.7-ers have this overlayed sticker (best checked with a bright white flashlight, e.g. LED).
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Old November 22nd, 2011, 03:13 PM   #35 (permalink)
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Quote:
Originally Posted by Puppa View Post
BTW, I noticed that if I look at the original box the Rezound came in, there is a new sticker exactly covering up an old sticker that details software revision, MEID etc. This together with my 3.8V battery. Any of you 3.7-ers have this overlayed sticker (best checked with a bright white flashlight, e.g. LED).
I have a 3.7 and also have a sticker overlay
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Old November 22nd, 2011, 03:22 PM   #36 (permalink)
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lol, I'm waiting for the "My sticker is better than your sticker" shenanigans!

I've got the 3.7 and 3.8 so I'm "bi-Facultas" wait whut?!?!
 
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Old November 22nd, 2011, 03:42 PM   #37 (permalink)
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lol, i'm waiting for the "my sticker is better than your sticker" shenanigans!
roflmao :d
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Old November 22nd, 2011, 05:01 PM   #38 (permalink)
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I got mine today from amazon and has 3.8. Awesome phone BTW.
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Old December 22nd, 2011, 08:55 PM   #39 (permalink)
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Bumping this thread for the newbies to post. Has anyone received any information from HTC as to why they have different voltages on the phone? Would be interesting to see why they went with different voltages and what difference it makes. For me I'm finding the 3.7 I have seems to last a tad bit longer, but then again it may just be in my head.
 
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Old December 23rd, 2011, 02:52 AM   #40 (permalink)
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I have the 3.7v red one (from their Guangzhou TWS factory).
The common lithium-ion batteries... I think they are supposed to have a 3.6 or 3.7v spec/rating, but the measured voltage when fully charged will typically be slightly higher (also normal).
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Old January 28th, 2012, 03:55 PM   #41 (permalink)
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I got my Rezound about 5 days ago and it shipped with the 3.8 volt battery. Initially I bought a standard back up battery and it was a 3.7 volt... I took it back and bought two extended batteries and put the rezound 3.8 volt battery in the htc thunderbolt.

Something is strange though about the stand alone charger I bought from verizon, it will NOT charge an htc thunderbolt battery! Only the rezound batteries (Both 3.8 and 3.7).
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Old January 29th, 2012, 05:25 PM   #42 (permalink)
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I bought mine on Thursday (1/26) and mine is 3.8v.
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Old January 30th, 2012, 05:16 AM   #43 (permalink)
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Purchased 12/16
3.8V

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Old January 30th, 2012, 02:49 PM   #44 (permalink)
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Purchased mine on 1/10/12 and it has a 3.8v battery.
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HTC Rezound
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The HTC Rezound is the first Beats by Dre smartphone from HTC and will be available on Verizon. It truly is a high-end beast as it boasts a 4.3 inch 720p HD display, a 1.5Ghz processor, 1GB of RAM, an 8 megapixel rear camera with 1080p HD video rec... Read More



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