Nikon D800 - Manual (Page 463)

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Battery Life
The number of shots that can be taken with fully-charged batteries
varies with the condition of the battery, temperature, and how the
camera is used. In the case of AA batteries, capacity also varies with
make and storage conditions; some batteries can not be used.
Sample figures for the camera and optional MB-D12 multi-power
battery pack are given below.
• CIPA standard 1
One EN-EL15 battery (camera) : Approximately 900 shots
One EN-EL15 battery (MB-D12) : Approximately 900 shots
One EN-EL18 battery (MB-D12) : Approximately 1,400 shots
Eight AA alkaline batteries (MB-D12) : Approximately 1,000 shots
• Nikon standard 2
One EN-EL15 battery (camera) : Approximately 2,400 shots
One EN-EL15 battery (MB-D12) : Approximately 2,400 shots
One EN-EL18 battery (MB-D12) : Approximately 3,800 shots
Eight AA alkaline batteries (MB-D12) : Approximately 2,400 shots
1 Measured at 23 °C/73.4 °F (±2 °C/3.6 °F) with an AF-S NIKKOR 24-120mm
f/4G ED VR lens under the following test conditions: lens cycled from
infinity to minimum range and one photograph taken at default settings
once every 30 s; flash fired once every other shot. Live view not used.
2 Measured at 20 °C/68 °F with an AF-S NIKKOR 70-200mm f/2.8G ED VR II
lens under the following test conditions: vibration reduction off, image
quality set to JPEG normal, image size set to L (large), shutter speed
1/250 s, shutter-release button pressed halfway for three seconds and
focus cycled from infinity to minimum range three times; six shots are
then taken in succession and monitor turned on for five seconds and
then turned off; cycle repeated once exposure meters have turned off.