Nikon D800 User Manual (en)

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 
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 
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.