Go Back   Android Forums > Android Phones > Samsung Galaxy Note 2

New Forums: Nexus Player | Nexus 9
Like Tree7Likes
  • 4 Post By twister6
  • 1 Post By colchiro
  • 1 Post By rcaine
  • 1 Post By twister6

test: Reply
 
LinkBack Thread Tools
Old September 19th, 2013, 10:19 PM   #1 (permalink)
Senior Member
Thread Author (OP)
 
twister6's Avatar
 
Join Date: Jul 2010
Posts: 1,808
 
Device(s): Fascinate, Droid X, Nexus 7, Note 2, S5
Carrier: V

Thanks: 140
Thanked 813 Times in 428 Posts
Default A MUST have tool to figure out faster charging of your phone/tablet, w/lots of pics!

With probably over a hundred of gadget and accessory reviews, this is the first time I'm making such a bold statement. Yes, I do consider this as one of the MUST have tools for any smartphone users. This is Charger Doctor, USB amp-volt tester I just got from DX.com : USB-AV USB Power Current Voltage Tester - Translucent Blue + Silver - Free Shipping - DealExtreme and this little guy is only $5.99

How many times we seen posts asking "my phone is not charging fast enough" or "I have a bunch of usb cables and old chargers, which one to use"? I lost a count. When it comes to chargers, at least those get labeled, although some are "mislabeled" or get degraded after months of use. Why do you think our phone is charging slow? Its the current output of your charger AND usb cables you are using. The charging formula is very simple, capacity of your battery in 'mAh' / rating of your charger in 'mA' = to get time in 'h' to charge. The number is usually approximated since nothing is ideal due to efficiency loses. So how do you find this perfect combo of charger and cables to give you the fastest charging speed? Use Charger Doctor!!!

This is a very simple little pass-through usb dongle. For those who know anything about electronics, and I actually took the case apart and snapped a few shots for your to appreciate the guts of it, or anybody who just have an open mind - the principle of this device is simple. You have full size usb input and output with interconnected power and signal, but power will go through a sensing resistor to measure voltage drop for calculating the current (ohm's law of V = I * R). I'm just guessing by looking at this gadget, it has some DAC to convert and to output the reading on a small led display which shows your Voltage reading and I-current reading. Here is a catch, since its full usb - it will connect between your charger and usb cable so you are NOT measuring at the output of the cable going into the phone. By using free Galaxy charging app you can approximately see the drop between the charger and going through the cable. Plus, this way you can "calibrate" the cable loss if you want to use this setup with another tablet or smartphone, other then Galaxy type.

In simple words for those who might not be following my technical explanation, just gather all your chargers and cables, and test different combinations to find the highest current reading you can get. KEEP in mind, when this little gadget is plugged in, it will draw its own current to power up dac and LED display, that is why you will see an additional drop when you compare reading with just a charger and a cable, and with this Charger Doctor in-between So once you find a perfect combo, unplug this dongle because it will "slow" down your charging by funneling some of the current. To demonstrate what I mean, I have a little presentation below with combination of 2 wall chargers and 3 pairs of cables, and took comparison pictures with Charger Doctor and without it. Keep in mind, this might not be 100% accurate, but it will give you a really good idea. As you can see, I found that one of the usb cables (black one) was the worst one, and the best combination of charging speed was using original Samsung OEM wall charger and yellow usb cable from UE boom. I hope they will also release a similar device with micro-usb in and out, but even with full size usb - for $5.99 its one cool gadget! Also, if you have solar powered charger - this will be a must where it will help you greatly to find a sweet sunny spot for a maximum current charge.

Here are the pics.







































And for EE or hobby geeks:







dave1812, DonB, colchiro and 1 others like this.

Advertisements
__________________
If you find my post helpful, please hit Thanks!

Complete List of all smartphone and tablet Accessory and Gadget REVIEWS by Twister => HERE
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~
twister6 is offline  
Reply With Quote
The Following 6 Users Say Thank You to twister6 For This Useful Post:
colchiro (September 20th, 2013), DonB (September 20th, 2013), GiggityGiggity (September 27th, 2013), Harry2 (November 3rd, 2013), Mikestony (February 4th, 2014), rcaine (September 24th, 2013)
sponsored links
Old September 20th, 2013, 02:53 PM   #2 (permalink)
Senior Member
 
colchiro's Avatar
 
Join Date: Jun 2010
Gender: Male
Posts: 8,886
 
Device(s): HP TouchPad, HTC One Max, Dell Venue 11 Pro
Carrier: Verizon

Thanks: 840
Thanked 1,820 Times in 1,413 Posts
Default

Just ordered two.
colchiro is offline  
Reply With Quote
Old September 20th, 2013, 04:20 PM   #3 (permalink)
Senior Member
Thread Author (OP)
 
twister6's Avatar
 
Join Date: Jul 2010
Posts: 1,808
 
Device(s): Fascinate, Droid X, Nexus 7, Note 2, S5
Carrier: V

Thanks: 140
Thanked 813 Times in 428 Posts
Default

Quote:
Originally Posted by colchiro View Post
Just ordered two.
I got two of these as well. First of all I wanted to be sure it performs consistently, you know how one might work while the other doesn't. That is confirmed, both work great. Next, will be a project to modify one with micro-usb male/female connectors so I can verify current between the cable and the phone.
twister6 is offline  
Reply With Quote
Old September 20th, 2013, 04:41 PM   #4 (permalink)
Senior Member
 
colchiro's Avatar
 
Join Date: Jun 2010
Gender: Male
Posts: 8,886
 
Device(s): HP TouchPad, HTC One Max, Dell Venue 11 Pro
Carrier: Verizon

Thanks: 840
Thanked 1,820 Times in 1,413 Posts
Default

I picked up a $15 usb breakout board that had micro and usb-a connectors on it, and would use a digital VOM to measure current. Never used it and really won't now, assuming these work.
colchiro is offline  
Reply With Quote
Old September 20th, 2013, 06:28 PM   #5 (permalink)
Senior Member
Thread Author (OP)
 
twister6's Avatar
 
Join Date: Jul 2010
Posts: 1,808
 
Device(s): Fascinate, Droid X, Nexus 7, Note 2, S5
Carrier: V

Thanks: 140
Thanked 813 Times in 428 Posts
Default

Quote:
Originally Posted by colchiro View Post
I picked up a $15 usb breakout board that had micro and usb-a connectors on it, and would use a digital VOM to measure current. Never used it and really won't now, assuming these work.
Do you have a picture of that break out cable? Just curious.

Btw, although I keep talking about this voltage/current tool for wall charger, you can use it for car charger as well, as long as you have enough room to jam it in there
twister6 is offline  
Reply With Quote
Old September 20th, 2013, 09:37 PM   #6 (permalink)
Senior Member
 
colchiro's Avatar
 
Join Date: Jun 2010
Gender: Male
Posts: 8,886
 
Device(s): HP TouchPad, HTC One Max, Dell Venue 11 Pro
Carrier: Verizon

Thanks: 840
Thanked 1,820 Times in 1,413 Posts
Default

Tindie: FriedCircuits' USB Breakout Board - tinkernaut



They have a digital version, but that was about 10x the price of yours:

twister6 likes this.
colchiro is offline  
Reply With Quote
Old September 24th, 2013, 03:37 PM   #7 (permalink)
Member
 
Join Date: Mar 2010
Location: Atlanta
Posts: 106
 
Device(s): Droid, Bionic, Note 2, Note 3
Carrier: Verizon

Thanks: 106
Thanked 14 Times in 14 Posts
Default

You sold me. I have three on order. Xmas presents for my family of geeks.
colchiro likes this.
rcaine is online now  
Reply With Quote
Old September 26th, 2013, 11:35 AM   #8 (permalink)
Senior Member
 
dave1812's Avatar
 
Join Date: Oct 2009
Location: San Jose, CA
Gender: Male
Posts: 732
 
Device(s): Nexus 7, Samsung Note 2
Carrier: Verizon

Thanks: 84
Thanked 112 Times in 81 Posts
Default

whats up with this??

Capture.JPG


see the error? looks like a cool tool.
dave1812 is offline  
Reply With Quote
Old September 26th, 2013, 01:43 PM   #9 (permalink)
Senior Member
Thread Author (OP)
 
twister6's Avatar
 
Join Date: Jul 2010
Posts: 1,808
 
Device(s): Fascinate, Droid X, Nexus 7, Note 2, S5
Carrier: V

Thanks: 140
Thanked 813 Times in 428 Posts
Default

Quote:
Originally Posted by dave1812 View Post
whats up with this??

Attachment 62110


see the error? looks like a cool tool.
Gee, took me a second to realize what you're talking about. Are you surprised they have a typo?

Hopefully by demand for this little guys, whoever is making it going to realize they need to make micro-usb version of it
dave1812 likes this.
twister6 is offline  
Last edited by twister6; September 27th, 2013 at 10:21 AM.
Reply With Quote
Old September 27th, 2013, 08:15 AM   #10 (permalink)
Member
 
GiggityGiggity's Avatar
 
Join Date: Dec 2011
Location: NW London, UK
Gender: Male
Posts: 281
 
Device(s): SG Note 2 & 3
Carrier: Not Provided

Thanks: 22
Thanked 42 Times in 31 Posts
Default

Awesome timing! This is exactly what I've been looking for. Just ordered 3.
GiggityGiggity is offline  
Reply With Quote
sponsored links
Reply

Samsung Galaxy Note 2
Current Rating:
Rate this Phone:

Announced at IFA 2012, the Samsung Galaxy Note 2 follows its predecessor with a focus on creativity. The device improves the experience by adding more S-Pen functionality and new-generation specs, not to mention the slightly larger 5.5-inch display... Read More



Go Back   Android Forums > Android Phones > Samsung Galaxy Note 2
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 08:16 AM.
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.