One plus one @slow charging

Hi Friends, i had experiencing this for almost one month..


my opo doesn't charging well, even like discharging when used while charging cable plugged in..

its very slow... like 8-10% per hour, that too not using it

i tried with other cables and chargers, no luck

i saw in synspse.. it not taking more than 300ma from ac charger

i tried battery calibration too... no luck
changed roms, flashed stock... no luck

please help me...
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