EN: Battery grip
A camera accessory connecting to its baseplate, with additional batteries and therefore extended battery life, to power the camera. Often with second shutter button and control dial, plus hand grip.
Canon glossary us
Power source. Either removeable (such as AA alkaline, lithium, rechargeable), or fixed, requiring in-camera charging using an exterior charger.
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Select Nikon battery chargers, which are used for newer rechargeable Lithium Ion batteries, are equipped with a battery calibration feature. Calibrate the battery as required to ensure the accuracy of the camera and charger battery level displays.
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