Wearable battery system

A battery interface apparatus for a wearable device, the battery interface apparatus comprising:

• a first base comprising a first battery internal side support surface, a first battery front support surface, and a first electrical connection interface configured to electrically connect to a first battery, the first battery internal side support surface and the first battery front support surface defining a first battery receiving slot;
• a mechanical latch feature configured to interface with a complementary mechanical feature of the first battery to contribute to a releasable maintenance of the first battery within the first battery receiving slot;
• and
• a magnetic latch feature configured to interface, via a magnetic bias, with a complementary magnetic feature of the first battery to contribute to the releasable maintenance of the first battery within the first battery receiving slot.

A method for operating a helmet system for powering helmet-mounted electronic devices, the method comprising:

• receiving a battery into a battery receiving slot defined by a battery side support surface and a battery front support surface, the battery side support surface and the battery front support surface being surfaces of a base of a battery interface disposed on an exterior of a rear portion of a helmet shell;
• mechanically engaging a mechanical latch feature with a complementary mechanical feature of the battery to contribute to a releasable maintenance of the battery within the battery receiving slot;
• magnetically biasing the battery into the slot via a magnetic latch feature interfacing with a complementary magnetic feature of the battery to contribute to the releasable maintenance of the battery within the battery receiving slot;
• electrically connecting the battery to an electrical connection interface of the base;
• and
• providing electrical power to one or more accessory devices via the electrical connection interface, the one or more accessory devices being supported by the helmet.