Nikon d3s User Manual (en)

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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 j is 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).