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 an 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-EL15 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.

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