Power packs configured to supply power to a common load are provided. A power pack includes a first power source; a second power source; at least one adapter configured to receive the common load and electrically couple the common load to at least one of the first power source or the second power source for supplying power to the common load; a tether interface electrically coupled to the at least one adapter, the first power source, and the second power source and configured to arrange the first power source and the second power source in series or in parallel; and a control circuit comprising at least one controller for performing a plurality of operations.

An assembly for enabling a caregiver to secure a physiological monitoring device to an arm of a user can include the physiological monitoring device a cradle configured to removably secure to the physiological monitoring device and to the user's arm. The physiological monitoring device can include a first connector port configured to electrically connect to a first cable and a first locking tab movable between an extended position and a retracted position. The cradle can include a base, first and second sidewalls, a back wall connected to the base and the first and second sidewalls. The cradle can further include a first opening in the back wall configured to receive the first connector port and a second opening in the first sidewall configured to receive the first locking tab when the physiological monitoring device is secured to the cradle and the first locking tab is in the extended position.

Apparatus for protecting batteries from impact, dust, dirt, moisture, smoke, and flame comprised of a container that accepts modular battery inserts that releasably retain batteries. Apparatus for protecting batteries capable of capturing batteries between insertable structures and the protective container walls. The apparatus can include insertable structures that can be inserted into the container in multiple orientations to provide or restrict access to batteries retained in said insertable structures. The apparatus can include electronics within the container, configured to charge batteries stored in the container either by utilizing an onboard power source such as an additional battery or an external power source such as household alternating current power, or both.

An electrode assembly, including an electrode plate at opposite sides of a separator, the electrode plate including a double-sided coated region having an active material on opposite sides of a substrate forming a current collector, and a single-sided coated region having an active material on a single surface of the substrate, wherein the single-sided coated region has a resistance that is higher than a resistance of the double-sided coated region.

A bicycle equipment is provided, including an electric power supply unit electrically connected to a first electric connector; a first component; a second component with an electrically powered device and a second connector. A through hole is provided in the first or second component. An electric connector assembly includes a third connector matching the first connector and permanently connected to the first component at a seat for the electric power supply unit; a fourth connector matching the second connector; and an electric cable extending between the third connector and the fourth connector. The through hole, the third connector and the fourth connector are sized such that the fourth connector may pass, in at least one orientation thereof, in the through hole and the third connector may not pass in the through hole.

An automated checkout system uses a shopping cart that is automatically charged when stacked into another shopping cart. Each shopping cart has a front charging connector and a rear charging connector. When a first shopping cart is stacked into a second shopping cart, the front charging connector of the first shopping cart connects with the rear charging connector of the second shopping cart. Electrical power can flow to the first shopping cart via the second shopping cart to charge a battery of the first shopping cart. The second shopping cart may be similarly stacked into a third shopping cart, wherein the second shopping cart receives electrical power from the third shopping cart. The second shopping cart may use this electrical power to charge its own battery or may provide some or all of the electrical power to the first shopping cart to charge the first shopping cart's battery.

Techniques for providing eyewear or other head-worn personal electronic apparatus with electrical components are disclosed. The electrical components can provide electrical technology to eyewear or other head-worn personal electronic apparatus without having to substantially compromise aesthetic design principles. The electrical components can be partially or completely internal to eyewear or other head-worn personal electronic apparatus. The electrical components can operate independently or together with other electrical components provided elsewhere. Apparatus for presenting after-market electrical components are also disclosed.

A ring includes a housing. The housing can include an inner surface configured to contact a finger of a user when the housing is worn by the user. The housing also can include a first power source configured to be wirelessly charged by a second power source that is removably coupled to the housing. The housing further can include a component configure to draw energy from the first power source. The component can perform one or more of: sensing an activity of the user wearing the housing or sending data to a communication device. Other embodiments are disclosed.

A battery pack includes a housing having a handle, rechargeable battery cells disposed within the housing, and a mating feature protruding away from the housing. The mating feature is configured to selectively connect the battery assembly with the receptacle of the charging rack and includes multiple ports electrically connected to the battery cells.

A portable battery charger includes a housing. The housing includes a battery receptacle configured to receive and connect to a battery. The charger also includes a heater surrounding the battery receptacle and a charging circuit provided in the housing to charge the battery. The charger further includes a temperature sensor disposed in the housing and an electronic processor in communication with the temperature sensor, the charging circuit, and the heater. The electronic processor is configured to determine, using the temperature sensor, a temperature of the battery, determine whether the temperature satisfies a low temperature threshold, in response to the temperature satisfying the low temperature threshold disable the charging circuit, and enable the heater to heat the battery.