Review on BONAI Rechargeable Batteries 5000MAh Capacity by Kurt Virden

All C-size batteries are 1.2 volts. Disposable batteries, size C, 1.5 volts. My flashlights didn't run on 1.2 volt batteries so I returned those batteries and charger. The seller paid for the return shipping. According to info, most Just Fine products are powered by rechargeable 1.2 volt batteries. The mining equipment didn't work at all. It was a lot of work on my part to buy and return. I didn't want to try and downsize double AA batteries to C size. There are products that go from double AA to C size. I wasn't sure how well this would work as reviews were mixed.