I need to charge tablets while using. Some power bank I use either:
- charge too slow when using and therefore the battery keeps dropping
- or charge equals use, drop a little, increase a little... but I don't charge it when it is 40% or 70%... I charge it when it is less than 10%. So that means when I use it while charging, afterwards I still get about 8-10%. The output is just not enough to charge it more than I use.

Based on the stocks you have, what do you recommend? Also prefer small & high capacity which I hope can keep inside my pants...possible? PM me details..TQ