A rechargeable battery that can be charged from any computer USB port could do away with the need for bulky adaptors, plugs and cables and even the requirement to be near a plug socket.

The USBCell from Moixa Energy is a standard-looking AA battery but with a flip-top lid that reveals an adapter, which can be plugged into a USB port for easy charging.

Company founder Simon Daniel said many battery-operated gadgets required only a low voltage power supply - such as a USB port - and that the battery could significantly reduce energy consumption. The newcomer makes its debut in high street retailers next month.