I'm a professional photographer and have used many K&F Concepts products. The products I have used have always been high quality and very reliable. I was impressed by these batteries as aftermarket batteries for my Canon Cameras.

The batteries will charge using either the K&F charger or the Canon charger. Out of the box there was a charger, 2 batteries with covers, and a USB charging cord. The charger uses either a USB C or a USB Micro cord, which is a nice feature if you have multiple cords hanging around like I do. The charger can charge 2 batteries at once and have a charge level readout. I like that the batteries sit upright in the charger, but that's just me. Charge time was a bit longer than a new Canon LP-E6 battery for comparison, but that is to be expected since the K&F batteries are a higher mAh than the Canon batteries

Performance of the batteries is better than my new Canon LP-E6 battery. The K&F battery lasted longer on a photo shoot where I was using one camera with the K&F and a co-photographer was using the same camera body with a Canon battery. Both of us shooting nearly the same number of photos before he had to change out his Canon battery.

Overall, I would buy the K&F batteries over OEM Canon batteries for price and performance. I will update my review in a few months with long term reliability results as in the past I have used aftermarket batteries (Not K&F) that started off great then had issues down the road with the camera recognizing them after multiple charge cycles