I'm "Canon" born and bred. Over the years, I've bought the Canon EOS 5Dmk1, 5Dmk2, 5DSr and 5Dmk4 all new and all from New York. Each time I bought a set of two, new official Canon batteries every time I bought each camera as I always use the associated battery grips for each camera. Now, some of those Canon batteries are getting tired and at some point I will buy an 'R' camera so wanted to buy descent, high power, replacement batteries. I've never really been a 3rd party equipment buyer, always opting to buy OEM gear (Canon) so this was the first time I've bought a 3rd party battery. I've heard so many horror stories of cheap Chinese rip-off versions of LP-6(+N+H) batteries, but these K&F batteries are superb! What I thought wasn't clear in the Amazon advert was, apart from charging via the USB cables, could these batteries be recharged in the official Canon charger and can they be recharged in a good quality 3rd party charger? YES, they can and they interface and operate/register with each of the listed cameras above as though you were using the official Canon batteries. I have no hesitation in recommending these cells. They are robust, reliable so-far, they don't get too warm when charging and they seem a very good quality product. They're not dirt-cheap for 3rd party batteries, but you get more than what you pay for with these......they are in a different league to other 3rd party batteries you find available and as such, they offer excellent value.

The thing I particularly enjoy about these is the USB charging port. I can hook them up to my power bank when they need charging, so there is no need to carry the official canon charger and find a plug it in the wall.

But also you can use all your old phone chargers if you want to. They even have a little light to tell you whether it's charged or charging

As far as functioning as a battery goes, these seem to last as long as the official R5 battery I got, they fit in the camera just as well as any battery, I've not had them for long so couldn't tell you how long they will last or what the durability is like. But the build quality is definitely better than many. I have tried and though they are a little bit more expensive than a lot you will find, I think they're definitely worth getting and trying

I now have 10 more than enough

Likes:
-So easy to charge without the need for a charger. Just a USB-C cable, and that's provided.
-Without doing extensive testing, they provide similar power to other aftermarket batteries.
-Fits camera perfectly and the batteries have an attractive and distinctive finish in white and grey.
-No messages from the camera.
-The price is reasonable.

I've no gripes about these batteries. Recommended.

What I like about this product:
1. You do not need a charger, is just USB-C.
2. Is recognized by my Canon R5 and the Canon R6.
3. Distinctive color so you distinguish from others.

What I do not like:
Nothing so far!

These come in a two pack and most importantly, they work. They come with USB-C cables to charge them or you can pop them into a standard Canon battery charger. They register with the R6MK2 and read properly on the camera. They last as long as the branded battery. It never hurts to have spare batteries in your kit.

I bought the double pack as my Canon R6 eats through power so having just the one battery isn’t an option. They are higher capacity than the OEM Plus they have the added bonus of a built in charging port so can be charged on the go with a battery pack.
Highly recommended.

I got two of these to replace aging E6 Canon batteries. They work flawlessly on three of my Canon cameras, EOS 7D, EOS 5D mark III and EOS R7. Later two are pictured. Highly recommended. Battery life more than the OEM and so is charging. USB-C charging is a life saver.

haven't used it much, but so far the batteries work well

That is so brilliant. The batteries are working properly. I'm excited to see what the continuous use will bring

Bought these to use in the Canon 90D base grip BG-E14 which uses two at a time. Camera recognizes them as Canon LP-E6NH batteries and and gives full access for battery usage (no warning messages). Nice 2600 mah rating for extended shooting.