364 Technical NotesThe 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 a GP-1or GP-1A GPS unit• Using an Eye-Fi card• Using a WU-1a wireless mobile adapter• Using VR (vibration reduction) mode with VR lensesTo ensure that you get the most from rechargeable NikonEN-EL14a batteries:• Keep the battery contacts clean. Soiled contacts can reducebattery performance.• Use batteries immediately after charging. Batteries will losetheir charge if left unused.
