I tested these batteries with my Nikon Z50. I found they do not last as long as the original OEM battery when recording video and also the maximum video clip length I could record was reduced by about half, probably due to overheating.

I was able to record 100 minutes of 1080p 60Hz video with these batteries. That is about half of the 208 minutes I recorded using the OEM battery. Also, the OEM battery was able to record 30 minute clips (which is the max my camera supports) without stopping whereas with these batteries recording halted after anywhere from 10 to 20 minutes. I am assuming the shortened clips was due to overheating as I was not watching the camera when the recordings stopped. Note, this was indoors in a 70 degree environment, not outside in the blazing heat.

As far as the charger, I found it took 2 1/2 hours to fully charge a depleted battery. Note also that the charger does not come with an adapter so you will have to supply your own. The charger is also able to charge the OEM battery.

These batteries are an inexpensive way to have backup power for your camera but I probably wouldn't want them as my primary battery due to their limited life.