Battery drop from 50% to 15% every time

[therob]

Yep, I still don’t say to ignore the possibilty to a swollen battery!!

Some more remarks for charging problems (by cleaning the USB-Connector), which could maybe also connected with wrong battery level:

Battery problems (wrong charging status / battery might be dying)

Did you maybe consider to clean your USB-Connector, as I just wrote in the posted topic and did myself (at least semi-) successful? As background information: I had problems while charging: charging process starts and stops if I just wobble/bend/touch the cable slightly (which other users also reported and mostly assuming a broken connector) I did a measurement with a external power meter while charging. Results: While correct charging with the original FP charger it should consumes…