2 Pack 1730mAh Batteries for GoPro Hero 12/11/10/9 Black, with 3-Channel LCD USB Fast Charger Fit for Gopro Hero 12 Black, Hero 11 Black, Hero 10 Black, Hero 9 Black

SKU: KF28.0032

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It mainly depends on the video mode setting. For example, 4K recording takes about an hour, and 1080p recording takes about an hour and a half. 
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Normal GoPro cameras are waterproof, and the battery can be used as long as the camera does not get wet. 
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Yes, the charger supports original batteries 
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Product includes 2 batteries, three-slot charger and USB charging cable 
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When plugging it in, it will prompt that functions that are not original cannot be used. It is okay to deal with it occasionally.