Friday, February 26, 2016

QI wireless charging receiver drains battery?

I've got one of those cheap Chinese inlay antennas (plugs into dedicated S4 pins, fits over standard battery under standard back cover, bulges the back cover ever so slightly).

I've been using it for a year or so, it works fine overall, but it seems phone doesn't last as long with this wireless receiver / antenna installed.

I've tested it, trying to keep same usage:
with antenna: 16 hours from battery full to empty
without antenna: 40 hours

That would imply that either antenna drains batter at ~100mA rate when not charging, or that when phone is charged (via wireless), battery is not charged as well as phone thinks it is.

Did anyone have any similar experiences?


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