iNew v3 1.1.5 ROM

[skully]

At 77% of charging my battery had 4.2 Voltage, but at 100% it fell to the 4.03 V .... How is that even possible

All the phones when are charged to 100% and keep them on the charger they will start discharging and after a period of time they will start the charging up to 4,2.
So if you keep the phone on the charger it will do cycles like the one I described before.
Each cycle takes about 1,5 hours.

At iNew the charge reaches to maximum at 87% and after a while it will jump to 100%.
The behavior you described before (at 77%) is usually happens when you reconnect your phone to the charger when you phone's battery is almost full.

My phone was at 14% when I connected the phone to the wall charger. I looked at him at 77% and as I said it was 4.2V. I left it like that and went to sleep. In the morning it was 100% and 4.03. I know that he discharging after a period of time but that is not normal to lose 0.2V..