LP-E17 Replacement Battery 2 Pack and Charger for EOS RP, Rebel T8i, T7i, T6i, T6s, SL2, SL3, EOS M3, M5, M6 Mark II, 77D, 200D, 750D, 760D, 800D, 8000D (Micro USB Port,1250mAH)

SKU: KF28.0003

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Hello, it is not compatible. The battery model required for this camera is LP-E12, and we are already developing it. 
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You can charge one or two batteries 
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Can be stored but not charged with the original charger 
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Yes, if you want to charge faster, you can also use a wall charger 5V/2A to charge the battery. 
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Yes, they are. I've used these in my RP and had no problems. Each battery can take over 400 photos, plus some video, before needing to be recharged 
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Canon 77D total 2828, 3 seconds / continuous shooting