EN-EL14

=Pinout= The insides of battery looks like this



The battery is rated to 7.4V, but it shows +8.33V fresh loaded. After usage if voltage goes down to +7.30V it is pulled down to 0V by battery internal electronic (protection against deep discharge).

It was observed that T is not connected on D3100/D5100 and is only used by Nikon charger.

The level of battery loading is shown by cameras based on measuring battery voltage (known starts from EN-EL3e).