i dont have a z1c,
but looks easy for the videos, just a bit of heat, remove the back cover,
and you have easy acces to unplug it,
check out at ebay battery replacement, and just get one, they all end up dead over years anyway,
No. Right now it is 37.7 deg Celsius but I played a game the time I noticed your message and it is warmed a lot... Already 35.8 - cooled for the time I wrote this message and becomes cooler and cooler.