what DC charger are you using? I got a 5V/1.5A 120V plug into my inverter an picked up a percent every 2 minutes. My charge time went from 3.2 hours to 1.2 hours.....If my phone amp meter app is correct, it was only taking .520 A from the DC charger, even though the charger is port is 'rated' at 2.1A. Cheap *** crap...and it gets friggin hot too. Into the dumpster.
