Chosen Solution
After doing a battery replacement I noticed that the phone shutsdown when the battery still had charge (according to the battery icon that is). I drained and fully charged a few times and even left it on the charger overnight but still have the issue. Anyone else having this issue?
It is better to do a factory reset after battery replacement. The ‘software’ perhaps is still using ‘calibration’ from old battery. Just copy all your files and reset!
