K&F CONCEPT NP-FW50 battery and dual slot battery charger kit for Sony Alpha 7, A7, Alpha 7R, A7R, A7R II, A7 II, A7S, A7S II, A7M2, A7SM2, A7RM2, A5000 A6000 A6300 A6500, a3000 , NEX-3, NEX-3N, NEX-5, NEX-5C, NEX-5N, NEX-5R, NEX-5T, NEX-6, NEX-7

SKU: KF28.0004

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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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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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Any USB charger will do. As long as it accepts European voltages, your phone charger will work. Super handy if you want to charge while driving. 
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Simply connect any 5V 2.1A Max output power source via the Micro-USB cable to safely charge the battery in the included charger. The connected power source can be a mobile phone adapter, a car charger, or a power bank, etc.But please do not directly connect the charger with power supply higher than 5V 2.5A. 
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I use these batteries interchangeably with Nikon EL15A/B batteries on my D500 and Z series cameras. The charger can also charge Nikon batteries. 
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Hmm.. I've never timed it, but it's the same as the original battery. I usually carry 5 batteries but never need to use 5, I only use 2 for all day shooting, which is literally a full day (8-10 hours). Hope this helps. 
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It will not cause problems to the data stored on the SD card, please use it correctly according to the requirements of the SD card. 
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This battery works for my Z6! This battery will charge in the camera! ! ! I haven't completely drained my battery yet! Hope it gives me something other than just 100of the first shot3Square batteries work better! EN-EL15The performance of the built-in battery (Nikon) is also poor, 102shooting, only open 2Hour! 
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The LED light will turn green when the corresponding battery is fully charged.