Nikon D4 - Manual (Page 473)

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Battery Life
The number of shots that can be taken with a fully-charged
EN-EL18 battery (2,000 mAh) varies with the condition of the
battery, temperature, and how the camera is used. Sample figures
are given below.
• CIPA standard: Approximately 2600 shots. Measured at 23 °C/
73.4 °F (±2 °C/3.6 °F) with an AF-S NIKKOR 24–70mm f/2.8G ED
lens under the following test conditions: lens cycled from infinity
to minimum range and one photograph taken at default settings
once every 30 s. Live view not used.
• Nikon standard: Approximately 5500 shots. Measured at 20 °C/68 °F
with an AF-S VR 70–200mm f/2.8G ED 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 standby timer has
expired.