First GS3 Road Trip

[Igo]

I may have forgot to mention that I was using a charge only cable, The Galaxy is up to 1.0A@5vdc but according to everything I have read it isnt supposed to draw any more that 750ma whereas I have mine confirmed at 890ma. the meter I used to measure this is called a "Watt's up" meter it has a resolution of 0.01v (+/- 1%). Basically Im saying that my setup isn't in question but good info on the charger to have. You probably also know this that a device will only draw as much amperage as it need and is typically regulated at the charging level.

One thing Im going to do in the future, simply because Im just that obsessive, is to make a test rig to measure actual battery draw from the battery in different scenarios. This would be helpful in determining how much extra battery is actually used when 4g is enabled vs 3g and how much WIFI and GPS actually draws

The 890 ma is looking pretty correct.
I purchased two of these Samsung OEM 5V 1A chargers from Amazon after having purchased 2 .7 ma chargers elsewhere.
I don't know how much power draw there is from background apps running while a phone is charging but I'm thinking that it can be close to the limited 500mha a P/C is capable of delivering. Most PCs will automatically dispense 100mha immediately upon communication with a USB device until an electronic "hand shake" is established at which time the PC will know what kind of draw the device is demanding....up to the rather limited 500mha hour the USB circuit is capable of delivering. The 1A chargers did not double the charging times of the 500ma, they quadrupled the charge time as the 500 is having to overcome whatever background apps are running then use whatever is leftover to charge the phone. The 1A chargers deal with the S3s resting state demands and all the extra, up until the battery is taking at it's limit rate which is everything between its resting rate and your 890ma and/or the chargers 1A capability. Pick up a couple of these chargers guys. They are very good. And they are stainless steel instead of coated tin. Very sturdy.

[Ollie]

I just got back from a road trip and tried CoPilot from the Market as my navigation app. I will never use it again. The routes were clear, but you had to manually advance the next leg of the trip to see where your next change was at. The interface is cluttered too. On the positive side it gives optional routes, is free, and has maps that you download locally.

[cybertec69]

Yeah, whenever the screen is on it just sucks the life out of the battery, even when its plugged in. Im going to do a test here on my next day off to see if with all the services turned off and with no apps running other than the OS what happens when the phone is plugged in but the screen is on. I have a feeling that it is probably either a no sum or possibly a small drain overall. Additionally my brightness level is set at 50%

Reason is that car chargers charge at a lower rate than a charger plugged into an outlet, and why on earth would you want the screen on while listening to music, even navigation, yea sometimes you might need it, but 90% of the time, that nice lady on the other end is telling you where to go "no need to look at the screen, and be distracted and cause an accident"

[Ollie]

The latest update being pushed out for the i9300 addresses modem drain on the battery. It is supposed to improve battery life significantly.

However, the two biggest battery killers are the screen and the GPS.

Sent From The Third Galaxy

[JD_Racer_Dad]

To date my Verizon Generic Dual USB car Charger I had for my LG Alley works well.
Charging while I using it.

The Verizon Dual Car charger I had for a Droid 2 works as well.

Both without a charge only cable.

The dual USB Griffin Powerjolt Dual Universal USB Micro does not.
It was in AC mode while charging.

The Qmadix QM-DMCH-4.2-AP USB Twin Tablet Charging 4.2Amp Kit does not.
It was in AC mode while charging.

Both caused my phone to heat up and the two at the top did not.

I use one USB port for the phone and one for my backup hands-free.
I have one more coming, I ordered before I had tried my older Verizon Generic
It claims one port is iPhone protocol and one not.
The iPhone side should work on my backup hands-free. We will see.

I got my last one.
It's a GTMax Metalic Silver 2-Port USB Car Charger Adapter.
And it worked great.
The 1.0 Amp outlet charged my phone while in use and didn't over heat.
I used the 2.1 Amp iPhone side to charge my spare hands free which worked fine with the non iPhone .5 Amp limit.

Anything compatible with an iPhone will still not work for my S3.

[Ollie]

I used a Bell charging hub that had two USB port and three cigarette lighter style plugins while on my trip. It worked great for the plethora of devices we carried along. It has a Max 5A total output.

I got it at Target.

Sent From The Third Galaxy

[JD_Racer_Dad]

cybertec, car chargers do not charge at a lower rate unless hooked up to a device they were not designed for.

They only charge at a lower rate if they are using a iPhone protocol on a non iPhone.
iPhone does not use the International charge standard with the data pins shorted in the charger for charge only devices.
The generics don't always say which they are.
There are several do it your self fixes to solder the pins, place card board over them or use a two wire charge only cable.
Better to find a non-iPhone charger.

The S3 when is use, uses more than the .5 Amp max reduction.
That .5 Amp max reduction comes from the PC USB data transfer protocol to protect your PC, not enough to charge your phone or Tablet for that matter while in use.

I have an external hard drive that has dual USB connections so it can get 1 Amp out of a PC.

While trying to find our why the generics I had did not work for my S3 I found
iPhone doesn't follow the:
September 2007 Open Mobile Terminal Platform,
the 17 February 2009 the GSM Association (GSMA) agreed standard charger for mobile phones,
the 22 April 2009 CTIA endorsed protocol, or
the Universal Charging Solution embraced by the International Telecommunication Union (ITU) On 22 October 2009.

My old phone screen and processor was not as powerful so I didn't care as much but it lost charge while in use as well.
It was an LG Alley.

[JD_Racer_Dad]

Igo and tharindhu, check the reviews on the Samsung OEM 5V 1A on Amazon.
Looks like about 20% rated it as poor as they can.
Long list of posts about not being the S3 OEM charger and not charging while in use.
As well as a long list of failures.

The 890 ma is looking pretty correct.
I purchased two of these Samsung OEM 5V 1A chargers from Amazon after having purchased 2 .7 ma chargers elsewhere.
I don't know how much power draw there is from background apps running while a phone is charging but I'm thinking that it can be close to the limited 500mha a P/C is capable of delivering. Most PCs will automatically dispense 100mha immediately upon communication with a USB device until an electronic "hand shake" is established at which time the PC will know what kind of draw the device is demanding....up to the rather limited 500mha hour the USB circuit is capable of delivering. The 1A chargers did not double the charging times of the 500ma, they quadrupled the charge time as the 500 is having to overcome whatever background apps are running then use whatever is leftover to charge the phone. The 1A chargers deal with the S3s resting state demands and all the extra, up until the battery is taking at it's limit rate which is everything between its resting rate and your 890ma and/or the chargers 1A capability. Pick up a couple of these chargers guys. They are very good. And they are stainless steel instead of coated tin. Very sturdy.

[valeres]

Reason is that car chargers charge at a lower rate than a charger plugged into an outlet...

Sometimes this is the case; however, I do know that the charge rate is the same since I was using a watt-meter to verify the charge rate.

...and why on earth would you want the screen on while listening to music, even navigation, yea sometimes you might need it, but 90% of the time, that nice lady on the other end is telling you where to go "no need to look at the screen, and be distracted and cause an accident"

Good point. I was just doing different scenario testing to gather information. I do like to have the screen on with the traffic overlay just in case I need to avoid certain areas. As of yet, I havent found the perfect NAV app and I am too lazy/busy to write one myself

[JD_Racer_Dad]

Just took a 7 1/2 hour road trip with Navigator and screen on, Radio App and about any thing else turned on with no problem.
Battery stayed charged.

I did try my GTMax Metalic 2-Port USB Car Charger Adapter last week on two 45 minute trips.
The iPhone 2 Amp side showing AC charging lost charge while in use.
The non-iPhone 1 Amp side did not.