K&F Concept LP-E17 Camera Replacement Battery 1250 mAh,Micro USB Dual Charger Compatiable with Canon EOS RP、Rebel T8i、T7i、T6i、T6s、SL2、SL3、EOS M3、M5、M6 Mark II、77D、200D、750D、760D、800D、8000D (2-Pack)

SKU: KF28.0003

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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 
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Normally charging and discharging300-500times, after 300 times, it begins to decay to 80% capacity, which is manifested in rapid power failure. 
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It will show battery life. But the battery life display is displayed in segments rather than numbers. 
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If the power is exhausted, use a 5V 2.1A adapter to charge, and the two LP-E17 batteries are expected to be fully charged in 2.5 hours 
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one year 
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No, our batteries cannot be charged with the original camera charger. But our charger can charge the original battery and our battery.