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The EN-EL14 battery can be used in the following cameras:


The insides of battery looks like this


EN-EL14 pinout
Pin Description
P+ Power + (Vcc)
S ??? (not used by battery)
C Battery identification
T Temperature info
P- Ground -

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 for protection against overheat.

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