Nikon N1538 Reference Manual page 417

The following can reduce battery life:
• Using the monitor
• Keeping the shutter-release button pressed halfway
• Repeated autofocus operations
• Taking NEF (RAW) photographs
• Slow shutter speeds
• Using camera Wi-Fi (wireless LAN) and Bluetooth features
• Using the camera with optional accessories connected
• Using VR (vibration reduction) mode with VR lenses
• Repeatedly zooming in and out with an AF-P lens.
To ensure that you get the most from rechargeable Nikon
EN-EL14a 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.
Technical Notes
389