USB Battery Packs
So I was invited into the closed beta of Ingress.
This game is absolutely BRUTAL on battery life and so I purchased a USB battery pack to help compensate when I am out for a few hours to keep my phone going.
So I purchased a USB battery pack that does email@example.comA or firstname.lastname@example.orgA.
Now when I plug my phone into the battery pack my phone shows its charging at 4.0v @ 2.1a but with GPS on and the screen on this simply cannot keep up.
The phone also shows its charging at 4.0v when its plugged into the wall and I know that is at least 15amps.
I'm thinking of buying another battery pack that does 4.0v @ 3a and was wondering if this could perhaps make the difference.
But the issue is that I have NO idea what my phone draws in amperage to charge my phone. All I know is that it has a 1850mAh battery..
Milwaukee | Milwaukee 400 Amp Clamp Meter | Home Depot Canada
See if you can find an electrician friend with one of these. Loop it around wire and read the amperage.
your phone can't possibly be drawing more than 2.1 amps?? I don't even think the note2 going balls out draws that much, only tablets
I could be wrong but I'm willing to bet your phone is charging at .5amps because it thinks it's connected to USB, does it say charging AC??? If not then it will die while plugged in.
You're using a samsung phone right? judging by the battery size it's an S2, type this into terminal emulator (root required) while your charger is plugged in, it will tell you your charging rate, I think you have to divide it by 10 to get the mah rating
[APP] Skyrocket Charger Test - xda-developers
USB from Battery Pack plugged into 5v @ 2.1a = 906mA = .9a
USB from Battery Pack plugged into 5v @ 1.0a = 872mA = .8a
AC from the wall = 906mA = .9a
So obviously this thing draws more than .5a when charging :shok: Wondering if this thing would pull more than 1a off a different source.
So not sure what is going on but apparently my phone receives the same amount of juice from the wall as it does my battery pack.... and when plugged into my battery pack it says "AC" not "USB"
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