Because I just bought a 12000 mAh power bank fully charged and it dropped from 3/4 to 1/4 while I was both using and charging my mobile phone.Also there are two data cable sockets on the power bank and one says 1A(ampere) on it and the other 2A. What are these supposed to mean?
Using your phone while it's charging uses more power than if you were just doing one.
Depends on what all your doing. If internet going and texting at same time it seems too. If doing just one at time then not so much
I think I have the same charger as you. The 2A output charges much faster - the 1A, a slower trickle. For you to use THAT much power, you must have a lot of things running in the background that are just plain wasteful. Go to Settings, and knock out things that are not needed all the time.
Did you actually charge the power bank before you used it? How long did this drop of 1/2 the available charge take? No cell phone should use up 6k mAh in less than 2 days unless you are playing games the whole time. The ports are marked for 1 amp and 2 amp power draw. The original USB spec is 5 volts DC at 1 amp draw, and many devices are limited to that spec as the lowest common denominator. Some newer devices can use the USB 2 spec when charging, which is 5 volts with a maximum of 2 amp draw. Basically it will allow a device that supports it to charge twice as fast as the USB 1 port.
