Compact multifunctional battery booster

A portable power pack comprising:

• a housing;
• a rechargeable lithium battery positioned in the housing;
• a display device positioned on the housing and configured to display a status of the portable power pack;
• a wireless charging coil positioned in or on the housing and configured to wirelessly couple with an external wireless charging coil of an external device through electromagnetic induction;
• a universal serial bus (USB) port to supply a charging current to charge a portable electronic device;
• a DC port to supply a starting current to jump start an engine of a vehicle that is electrically coupled with an external battery;
• a manual override interface;
• and
• a power management circuit operatively coupled to the wireless charging coil and the rechargeable lithium battery,
• wherein the power management circuit is configured to output the charging current from the rechargeable lithium battery to the portable electronic device via the USB port or the starting current from the rechargeable lithium battery to the vehicle via the DC port, and
• wherein the power management circuit is configured to output the starting current to the vehicle via the DC port upon actuation of the manual override interface.

A portable power pack comprising:

• a housing;
• a rechargeable lithium battery positioned in the housing;
• a display device positioned on the housing and configured to display a status of the portable power pack;
• a wireless charging coil positioned in or on the housing and configured to transfer power wirelessly with an external device;
• one or more direct current (DC) output ports;
• a manual override interface;
• and
• a power management circuit operatively coupled to the wireless charging coil and the rechargeable lithium battery, wherein the power management circuit is configured to output DC power from the rechargeable lithium battery via the one or more DC output ports, and
• wherein the power management circuit is configured to output the starting current to the vehicle via the one or more DC output ports upon actuation of the manual override interface.

A jump starting apparatus for jump starting a vehicle having an external battery, the jump starting apparatus comprising:

• a housing;
• a universal serial bus (USB) port positioned on the housing;
• a direct current (DC) output port positioned on the housing and configured to electrically couple with the vehicle via a pair of battery cables;
• a rechargeable lithium battery positioned in the housing and configured to supply, via the DC output port, a starting current to jump start the vehicle,
• wherein said rechargeable lithium battery is rated at least 3,000 mAh and the starting current is at least 200 cranking amperes;
• a wireless charging coil positioned in or on the housing and configured to transfer power wirelessly with an external device in accordance with the Qi wireless power transfer standard;
• a display device positioned on the housing and configured to display (1) a status of the wireless charging coil and of the USB port, and (2) a state of charge of the rechargeable lithium battery;
• a processor positioned within the housing and operatively coupled to the USB port, the rechargeable lithium battery, the wireless charging coil, and the display device via a display driver,
• wherein the processor is configured to control (1) power transfer to or from the rechargeable lithium battery via the wireless charging coil and the USB port, and (2) operation of the display device;
• one or more sensors configured to detect whether (1) the external battery is connected across the pair of battery cables, and (2) a reverse polarity condition of the external battery exists;
• a power management circuit operatively coupled to the one or more sensors configured to output the starting current to the vehicle upon satisfying one of more conditions, wherein the one or more conditions include that the external battery is connected across the pair of battery cables and that the reverse polarity condition does not exist.