I updated my Z1 to Kit Kat 4.4 v 108 yesterday via PCC. Everything was fine. Have my phone backed up before updating.

Before going to bed, battery power shows 68% and I charged my phone via magnetic cable. The next morning the phone battery was ZERO! and Whatsapp says my date is wrong. How this happens, can anyone help me please? he battery drained out overnight.

I also have the following Questions:-

1. If I want to revert to Jellybean, would the RESTORE my back up via PCC restore it?

2. Do I need to do a factory reset after updating to KK? Or it is not necessary.

3. I have waited until now to update to KK after all bugs been rectified BUT I still encounter such problems.

Can some experts here help me out. Would really appreciate it.

Thank you.

Ok..if I were to do a factory reset (last resort) all apps and data will be erased completely. Then I just need to RESTORE back all APPS and data via PCC again.

Am I right? TQ.

OK..Tq Carpathia and Ckchan. I'm gonna monitor again how come and why my battery drained out overnight before I do the factory reset.

Now my magnetic cable is charging the phone well again.

Thank you once again guys. You all have been a great help.

No my magnetic cable is not SONY ori. Bought from oline BUT its as good as ori during my charging over night when my phone was on JBean then.