K&F Concept 2 Pack 2100mAh EN-EL15 EN-EL15A/B Battery and Dual Battery Charger Set for Nikon D7000 D7100 D7200 D7500 D850 D750 Z5 Z6 Z7(Arrives before August 7th)

SKU: KF28.0001

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New decoding, support original charger charging 
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It's hard to say exactly when. I've tried and can take over 1000 shots on a fully charged battery, hope this helps. 
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Personally, I charge the battery ahead of time or when I arrive at my destination hotel. I then store the battery in my camera bag, separate from the charger. So far, I'm happy with these batteries. 
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I've tried both, and it's pretty fast either way. 
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Third-party batteries can be charged with KF chargers, but based on reliability considerations, KF batteries should use KF chargers as much as possible, and our products are guaranteed safe. 
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You can charge one or two batteries 
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I can't give you an exact time to charge the battery - too many variables, how discharged the battery is, how old the battery is, etc. But I can tell you that what you plug in makes a huge difference. I use a small adapter that plugs into a 110V outlet instead of using a computer's USB port, and in particular a 5V 2A fast charger for my phone works best. 
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Battery life varies with different photography camera modes and picture quality settings 
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Micro and Type-C are input ports, they charge the battery. USB-A is the output port, which discharges the battery. 
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The battery will automatically match the applicable voltage of the camera, and the use will not be affected