Heated hand garment

A heated hand garment comprising:

• a body;
• a heating element positioned on the body and operable to heat at least a portion of a hand of a user;
• and
• an electronic controller removably supported by the body, the electronic controller operable to control charging and discharging of a battery pack configured to be supported by the body,
• wherein the battery pack is configured to power the heating element.

A battery holder assembly for supplying power to an electronic device, the battery holder assembly comprising:

• a rechargeable battery pack;
• a battery-receiving receptacle configured to be removably coupled to the electronic device, the battery-receiving receptacle including
• a cavity configured to receive the battery pack,
• an input port for receiving power to charge the battery pack, and
• an output port for supplying power from the battery pack to the electronic device;
• and
• an electronic controller operable to control charging and discharging of the battery pack while received within the battery-receiving receptacle.