The charging block they send with it does not have the regular USB port to insert the cable into but the smaller; whatever it is called, end that goes into the scope, so I've used ones we have at home. I don't understand this at all. The problem has been rendered academic as I went to check on charge level after 8 hours of charging (still not fully charged) and the scope won't turn off. Just counts down to one. Tried with it charging and not charging, also off charger and just with battery. Decided to try menu and nothing works. Only thing that it does is it turns on with the PIP in its initial setting of 4X.