I know nothing about them, but I have just ordered one thinking I could use it with my Hi micro Lynx thermal spotter or Mk 1 Alpex, if internal batterys ever runs out on me.
However, I have just read on web that you should not use power banks with thermal spotter, so I assume NV scopes also.
So, can you ? How do they work, do you leave it plugged into device while you are using it via cable ? Or is it just to recharge internal battery of device then remove cable, if the latter how do you know when it's charged ?
Apparently it's a 9,000,000 mAh capacity.