Portable power supply

A kit comprising:

• a portable power supply including
• an AC-to-DC converter coupled between the mains input and a rechargeable battery unit,
• a DC-to-DC converter, wherein the rechargeable battery unit couples to an input of the DC-to-DC converter,
• a power inverter for converting direct current (DC) into alternating current (AC),
• a housing for enclosing the AC-to-DC converter, the rechargeable battery unit, the DC-to-DC converter and the power inverter, and
• an AC outlet disposed on the housing,
• wherein the rechargeable battery unit is connected between the AC-to-DC converter and the power inverter;
• a first-voltage DC power converted from the AC mains via the AC-to-DC converter is stored in the rechargeable battery unit, thereby supplies the first-voltage DC power to the power inverter and such that in use, the first-voltage DC power from the rechargeable battery unit is converted to AC output available at the AC outlet of the portable power supply by the power inverter;
• and
• one or more rechargeable battery packs.

A portable direct current (DC) power supply operated on AC mains having a mains input, the portable DC power supply comprising:

• an AC-to-DC converter coupled between the mains input and a rechargeable battery unit;
• a DC-to-DC converter, wherein the rechargeable battery unit couples to an input of the DC-to-DC converter;
• a housing for enclosing the AC-to-DC converter, the rechargeable battery unit and the DC-to-DC converter;
• and
• a DC output terminal disposed on the housing outputting first-voltage DC power from the rechargeable battery unit;
• wherein the DC output terminal is connectable to a detachable DC-to-AC power inverter and supplies the first-voltage DC power to the power inverter and such that when the DC-to-AC power inverter is connected to the DC power supply, the first-voltage DC power from the DC output terminal is converted to AC output via the detachable power inverter.