Very good product, but one small downside
I was surprised to see that it couldn't be switched on while it was charging.
So if you need to use it at 100% brightness to shoot a video, you'll only get 66 minutes of autonomy.
However, in my case, I bought it to take photos and to light up my webcam.
In the case of photography, I don't need a huge battery life, so whatever my settings, it's not a problem.
In the case of using the webcam, it bothered me a bit more because I would have needed it for long periods of time. But after a few tests, I realised that it was already more than enough at 5% - 15% brightness. And in this case, the battery life increases drastically, up to 16 hours.
I'd have liked to be able to use it while it was charging, but I don't think I can, because it would overheat.
A little bonus: it's sold with some nice accessories for mounting it in different ways, and the allen key is included.
For those who want to use it to charge their phones: it works well on my old Pixel A4, and charges it quite quickly.