Abstract: A jump starter for charging or boosting a depleted or discharged battery, the jump starting device, including a rechargeable battery; a positive battery connector for connecting the jump starting device to a positive terminal of the battery; a negative battery connector for connecting the jump starting device to a negative terminal of the battery; a power switch for connecting the rechargeable battery to the depleted or discharged battery when connected to the jump starting device during charging operation of the depleted or discharged battery; a first detector for detecting presence of the depleted or discharged battery connected to the positive and negative battery connectors; and a second detector for detecting presence of the depleted or discharged battery connected to the positive and negative battery connectors.

Abstract: A portable jump starter and air compressor device, including a jump starter, air compressor, and/or vacuum cleaner. One or more of the jump starter, air compressor, and/or vacuum cleaner are powered a same or different one or more rechargeable batteries (e.g. one or more Li-ion batteries). The air compressor, for example, includes a piston/valve arrangement configured to allow a piston of the piston/valve arrangement to move in close proximity to a cylinder head of the cylinder of the air compressor.

Abstract: Provided is a jump starting device for charging a depleted discharge battery, the device includes a rechargeable battery having a positive terminal and negative terminal; a switch comprising a jump start current sharing circuit electrically connected to the rechargeable battery; and a battery clamp electrically connected to the jump start current sharing circuit.

Abstract: A vehicle battery jump starter with air pump device includes a vehicle battery jump starter and an air pump disposed within a cover. An internal battery is also disposed within the cover and connected to the vehicle battery jump starter and the air pump. A port is provided so as to provide connection to the device from an external vehicle battery. The air pump is configured such that it is powered by the external battery in a first mode of operation.