The following Nikon D300S battery life numbers (how many photos can be taken before power from the Nikon EN-EL3e 7.4V, 1500mAh Lithium Ion battery pack or Nikon EN-EL4a 11.1V, 2500mAh Lithium Ion battery pack runs out) is extracted from the Nikon D300S Manual and the Nikon D300S Specifications page.
Nikon provides two sets of battery life figures, one based on the CIPA standard, and the other on their in-house, Nikon standard.
Five different power supply conditions are tested:
- One fully-charged Nikon EN-EL3e, either in-camera or in an attached Multi-Powered Battery Pack Grip MB-D10.
- One fully-charged Nikon EN-EL4a battery pack in the MB-D10 battery grip (a BL-3 battery chamber cover for the battery grip is required when you use EN-EL4a batteries).
- Two fully-charged Nikon EN-EL3e battery packs, one in the camera, and one in the MB-D10 battery grip.
- One fully-charged Nikon EN-EL3e battery pack in the camera, and one fully-charged EN-EL4a battery pack in the MB-D10 battery grip.
- Eight AA-sized batteries in the MB-D10 battery grip.
Figures calculated based on CIPA (Camera & Imaging Products Association) testing standards (see the section titled “Standard Procedure for Measuring Digital Still Camera Battery Consumption” for more information) are obtained in the following manner (quoted from the Nikon D300S Manual):
Measured at 23°C / 73.4°F (±2°C/3.6°F) with an AF-S VR 24–120mm f/3.5–5.6G 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; flash fired once every other shot. Live view not used.
Nikon D300S battery life, CIPA standard:
- One EN-EL3e battery (in the camera or in the MB-D10): Approximately 950 shots
- One EN-EL4a batteries (in the MB-D10): Approximately 2000 shots
- Two EN-EL3e batteries (one in the camera and one in MB-D10): Approximately 1900 shots
- One EN-EL3e battery in the camera, and one EN-EL4a battery in MB-D10: Approximately 2950 shots
- Eight AA batteries (in the MB-D10): Approximately 1200 shots
Figures calculated based on the Nikon standard are obtained in the following manner (quoted from the Nikon D300S Manual):
Measured at 20°C / 68°F with an AF-S VR 70–200mm f/2.8G ED lens under the following test conditions: image quality set to JPEG basic, image size set to M (medium), 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.
Nikon D300S battery life, Nikon standard:
- One EN-EL3e battery (in the camera or in the MB-D10): Approximately 3000 shots
- One EN-EL4a batteries (in the MB-D10): Approximately 5900 shots
- Two EN-EL3e batteries (one in the camera and one in MB-D10): Approximately 6000 shots
- One EN-EL3e battery in the camera, and one EN-EL4a battery in MB-D10: Approximately 8900 shots
- Eight AA batteries (in the MB-D10): Approximately 3400 shots
Unlike Canon, unfortunately, Nikon does not provide separate battery life figures for movie and Live View shooting, and photography at 0°C / 32°F / freezing temperature.
Other Battery Life Factors
In the D300S Manual, Nikon advised that the following will lead to a reduction in battery life and number of shots:
- Using the LCD monitor.
- The shutter-release button is kept pressed halfway.
- Autofocus operation is repeatedly performed.
- Shooting NEF (RAW) or TIFF (RGB) instead of JPEG images.
- Slow shutter speeds.
- Using the WT-4 wireless transmitter (applies to WT-4A / B / C / D / E — designation depends on country / region).
- Using the GP-1 GPS unit.
- VR (vibration reduction) mode on VR lenses is activated.
Some lenses draw more power from the camera’s battery during operation due to their physical (heavy lens elements that need more power to move) and electronic (type and technology of the VR employed) properties.