BATTERY POWER SYSTEM

A battery power system for powering at least one electric motor. The system comprises a main battery and an intermediate storage device electrically coupled to the main battery such that the intermediate storage device can be charged by the main battery, and the intermediate storage device being configured to supply power to the electric motor. The intermediate storage device is constructed and configured to accept and deliver charge at a higher rate than the main battery whilst having a lower energy storage capacity than the main battery.