Betavolt’s nuclear battery currently generates 100 microwatts at 3 volts, all packed into a small 15x15x5 cubic millimeters. However, the goal is to reach a 1-watt power output by 2025.

China's Beijing Beitabute New Energy Technology Co., Ltd. announced that it has developed an ultra-small nuclear battery that measures 15 mm x 15 mm x 5 mm, which is even smaller than a 20 mm ...