The following can reduce battery life:

Using the monitor

Keeping the shutter-release button pressed halfway

Repeated autofocus operations

Taking NEF (RAW) or TIFF (RGB) photographs

Slow shutter speeds

Using the optional WT-4 wireless transmitter

Using the optional GP-1 GPS unit

Using VR (vibration reduction) mode with VR lenses

To ensure that you get the most from rechargeable Nikon EN-EL4a batteries:

Keep the battery contacts clean. Soiled contacts can reduce battery performance.

Use batteries immediately after charging. Batteries will lose their charge if left unused.

Check the condition of the battery regularly using the Battery info option in the setup menu (0 333). If jis displayed for Calibration, calibrate the battery using the MH-22 quick charger (if the battery has not been used for more than six months, recharge the battery when calibration is complete).

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