What USB and AAA battery testers do you recommend?

Question

USB

I've been wanting two devices for a long time:
1. Some sort of AAA battery checker, it can be AAA so that it is smaller in size, I practically don’t use other types, Google offers different options:


I think it would be convenient to see the approximate charge in percent. Maybe someone met this? I have this on the alarm keychain, if I could find this separately, it would be great!
2. Checker USB, this is used in many videos and seems to be enough on the market:


But maybe someone has some experience? what is better not to take, but what to pay attention to?
If you also offer small interesting devices that make life easier for a simple user, which you often use yourself, then I will be glad)