Hmm... That's rapid?

Especially at 35% to start

Check what's running in the background, sort the uber-low reception(turn off the phone? Change provider? Drop from lte to 3g?) (a hit on the battery).

A friend from work installed an app which drained his battery so fast it was draining while he charged the phone with the original charger...

from 10 to 100. sometimes it takes 8 hours. my phone gets 300mA from a 1A charger. it should get 3 times more. i tried a lot of combinations. changed cabels, power sources, ect.. i don't know what's causing the problem. this is a new phone! 4 months old! Samsung Galaxy J3
i hate Samsung

@nocgod well its either the powerpak or the cable, i think it's powerpak, it's one of those cheap ones.

Cable is new and usually charges in 1-2 hours if plugged to A/C.

But still how can it claim 3 hours is "charging rapidly"....

@billgates It might detect 2.1amps and assume that's 'rapid'