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  Reply # 881621 20-Aug-2013 16:04
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Anyone know how you can tell if possible, what input the S4 is getting whilst it's charging? I want to verify that the special port on my desktop computer which provides more than the standard amount of power, is indeed supplying more power? Same with my Car Charger which is rated at 2.1a but I am sure isn't any faster than the 1a charger I was using before.

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  Reply # 881665 20-Aug-2013 17:11
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Batteries can only take power so quickly. 2 hours is the recommended minimum for NiMH batteries, LiIon is a bit shorter but it depends on the cell.

From BatteryUniversity

The charge rate of a typical consumer Li-ion battery is between 0.5 and 1C in Stage 1, and the charge time is about three hours. Manufacturers recommend charging the 18650 cell at 0.8C or less. Charge efficiency is 97 to 99 percent and the cell remains cool during charge. Some Li-ion packs may experience a temperature rise of about 5ºC (9ºF) when reaching full charge. This could be due to the protection circuit and/or elevated internal resistance. Full charge occurs when the battery reaches the voltage threshold and the current drops to three percent of the rated current. A battery is also considered fully charged if the current levels off and cannot go down further. Elevated self-discharge might be the cause of this condition.

NB: 1C means charge a 1000mah battery at 1000mah current. 0.5C is charge it at 500mah.

Read that article for interesting information, like to prolong your battery life it's better not to fully charge it, and charge it while it's off. That means getting a wireless charging pad and putting it on and off throughout the day may actually be better for your battery than daily charges, though it wouldn't be off.

Simple Guidelines for Charging Lithium-based Batteries


  • A portable device should be turned off while charging. This allows the battery to reach the threshold voltage unhindered and reflects the correct saturation current responsible to terminate the charge. A parasitic load confuses the charger.

  • Charge at a moderate temperature. Do not charge below freezing.

  • Lithium-ion does not need to be fully charged; a partial charge is better.

  • Chargers use different methods for “ready” indication. The light signal may not always indicate a full charge.

  • Discontinue using charger and/or battery if the battery gets excessively warm.

  • Before prolonged storage, apply some charge to bring the pack to about half charge.

  • Over-discharged batteries can be “boosted” to life again. Discard pack if the voltage does not rise to a normal level within a minute while on boost. 





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  Reply # 881669 20-Aug-2013 17:25
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Thanks for that, but it doesn't really answer my question. I want to know if it's possible from the phones software for it to tell me what voltage and amperage the powersupply currently connected is operating at.

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  Reply # 881690 20-Aug-2013 18:10
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No idea sorry.




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  Reply # 881693 20-Aug-2013 18:16
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I've got  this app that tells me what is going into battery if that helps. Helpful showing what chargers are good and what are junk





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  Reply # 881695 20-Aug-2013 18:21
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Geez, there's an app for everything.




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  Reply # 881696 20-Aug-2013 18:23
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lol yep gets a bit outta hand really but handy as I had 3 chargers of which only the official one gave me the full charge




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  Reply # 881700 20-Aug-2013 18:54
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My transformer charger gives me 1200 or so. I forget exactly. Huge charger.




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  Reply # 881701 20-Aug-2013 18:54
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jeffnz: I've got  this app that tells me what is going into battery if that helps. Helpful showing what chargers are good and what are junk





Awesome thank you.



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  Reply # 881703 20-Aug-2013 18:56
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Interesting that the Official Samsung charger is giving me 780!

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  Reply # 881704 20-Aug-2013 18:58
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timmmay: My transformer charger gives me 1200 or so. I forget exactly. Huge charger.


yes I get 1200 off ac through my samsung supplied charger 





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  Reply # 881719 20-Aug-2013 19:04
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This is the current Rom I'm using, find it very good and has a lot of options to customize things.





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  Reply # 881807 20-Aug-2013 20:49
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jeffnz: This is the current Rom I'm using, find it very good and has a lot of options to customize things.



Max's voice suddenly gone hitch pitched? Rom looks.. I think my stint on stock is at an end...




- Telstra HTC Touch Pro2 - Energy ROM WM6.5.5 20 Oct/Cyanogen Mod Froyo 2.2 - R.I.P
- AT&T Galaxy S Captivate 16GB on XT (now with brother)
- Samsung Galaxy S2 on XT- Runs ICS 4.0.3 Resurrection Remix 9.2
- Business Hours - Work In The Electricity Industry, After Hours - DJ/Turntablist - Will Scratch Vinyl For Free'
- What's next??? S3?

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  Reply # 881925 21-Aug-2013 01:08
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@ timmmay:
Yes that is true in some cases, I personally use an app called Clean Master, it's very useful to clean cache, useless files/back ups and clean ram. Try it :)

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  Reply # 882536 22-Aug-2013 08:20
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networkn: Interesting that the Official Samsung charger is giving me 780!


screen off or screen on? and are you using the supplied cable or a generic one.  I have read there are physical differences with the supplied cable.

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