Have been using these as backup batteries for my Canon R6. They’ve been great, no issues! I recommend!

Charger seems a bit slow but tge batteries last well and function just like the original representing great value for money.

Kit arrived on time, working, convenient in use. thanks

Amazing alternative option to original, cheap and just as reliable

i as yet have seen no difference compared to the canon batt however i have done no formal testing and i don't shoot 1000s of shots a day that would weed out a lesser battery but even if it had only 3/4 the capacity i would still give it 5 stars as the double charger is worth £43 GBP on its own as i buy a canon dual charger for my 5Dmki and it was £220 15 years ago if my memory is correct, and only charged 1 batt at a time not both together like this one

Bought this set as I am travelling soon and required additional Batteries for the new R6.
Purchased as others had reported the Battery info was recognised by the camera which was important to me.
Charged both Batteries and tested both, Happy to say that so far they are both working well and time will tell as to how long they perform.
For the price it gives me a longer shooting time and peace of mind while travelling.
Charger works great as well.

Great price, 2 replacement batteries , early days but seem to last as long as the very expensive canon batteries.
Can charge with a pd power bank which is ideal when no mains power is available

Whert his money.

I bought it to have two more spare batteries, so they already work like the original in my Canon R, I can charge the original battery in this charger and vice versa. Everything OK.

I've done a little comparison of some different batteries and the R5. Not scientific at all but some stats for battery life etc as I use the camera. The camera seems happy with the K&F Concept batteries and does not give an error about non-genuine batteries (unlike my 5DsR).
Right a bit of background of how the R5 uses a battery and its frame rate. If you set the camera to high speed continuous+ (green H+ icon) it has 3 modes - A, B and C which are dependant on how much charge is in the battery. Mode A (green H+) can achieve up to 12fps, mode B (white H+) can achieve up to 9.2fps and mode C (blinking white H+) can achieve 6.8 fps.
As a battery runs down the frame rate will move to the next lowest mode at certain percentages of battery power that's left. This is where I've tried to find out at what point different batteries change mode.
Now the numbers.

Canon LP-E6N battery (2+ years old) - Mode A works till the battery is at 46% (282 shots), Mode B then continues down to at least 5% (total 431 shots) I then had to change battery. Never reached Mode C.

Canon LP-E6NH (1 month old) - Mode A works till the battery is at 38% (399 shots), Mode B then continues down to at least 5% (total 462 shots) I then had to change the battery. Never reached Mode C.

K&F Concept LP-E6NH (2 weeks old) - Mode A works till the battery is at 75% (150 shots), Mode B then continues down to at least 5% (total 420 shots) I then had to change the battery. Never reached Mode C.

Obviously the genuine Canon NH battery is best but most expensive. The K&F Concept has less overall shots than old Canon N batteries but not by much and this test was all just based on one use of each battery. They may even out a bit more when averaged.

Anyway, if you need 12fps for the longest time then you have to get the genuine Canon NH battery. If 12fps for the first quarter and then 9fps for the rest of the battery is good enough then the K&F Concept batteries are awesome value for money. Personally I don't have a problem with the slightly reduced fps compared to spending £150 on a single Canon battery.
Of course if you go on to electronic shutter then you get 20fps at any battery percentage.
Hope that helps.