Abstract: A charging system includes: an interface configured to removably and electrically couple to an external battery; a connector configured to removably and electrically couple to an on-board diagnostic (OBD) port of a vehicle; charge management circuitry electrically coupled to the interface and the connector; and a microcontroller unit (MCU) coupled to the charge management circuitry. The MCU is configured to execute computer readable program code for managing an output of current from the external battery to a vehicle battery of the vehicle through the electrical coupling of the connector and the OBD port. The charging system can be used to prevent a vehicle battery from becoming discharged during extended periods of storage.

Abstract: A compact portable battery charger coupled with a detachable tool battery or similar external source that enables a convenient portable method to recharge or provide a boost to a secondary depleted battery such as that of a combustion engine. The portable battery charger apparatus incorporates a method of extracting energy from a tool battery pack, or the like to fast charge a secondary battery. The secondary battery could be of various electrical and physical size. The extracted energy is transferred to the secondary battery connected to the output of the charger using a high efficiency DC-to-DC switching regulator.

Abstract: An expandable cooler is provided. The cooler includes an insulating portion defining a storage cavity and an expandable portion defining a second storage cavity. The expandable portion is adapted to move between an open and a closed position. The expandable portion may be fixedly attached to the insulated portion. In a further embodiment, a telescoping handle is attached to the cooler. A hook is provided on the telescoping handle and is adapted to be received in a corresponding slot in the expandable portion. The expandable portion may be moved between the open and closed position via the handle.

Abstract: A high frequency charger includes a charge circuit for charging a depleted battery and a boost circuit for jump-starting a vehicle. Two separate high frequency transformers are provided for the charge and boost circuits. A selector switch selectively activates at least one of the charging circuit and the boost circuit.

Abstract: A flashlight is provided. The flashlight includes a housing having a first end and a second end. A first light source is disposed at the first end of the housing. A second light source is disposed at the second end of the housing. A battery is disposed in the housing. A selector selectively couples the first light source and the second light source to the battery.

Abstract: A portable light includes first and second d.c. lamps. A first housing portion has longitudinal access and encloses the first lamp while projecting a first light beam in a direction of longitudinal access. The first housing portion has a exterior surface contour and includes a compartment containing an electrical device connectable to a d.c. power supply connectable in circuit with the first lamp. A second housing portion is the shape of a hand grip and extends from first side of the first housing portion in a direction transversed to the longitudinal access to the first housing portion. The second housing portion encloses the second lamp which is connectable in circuit with the electrical device for projecting a second light beam in the direction forming at an angle with the longitudinal access of the first housing portion.