Batteries are still the most reliable and convenient form of portable power, and are fundamental to the day-to-day running of any business. The list of devices which rely on batteries is endless, including remote controls, clocks, calculators, cameras, watches, portable radios and many more. Within catering, this is especially important for thermometers which are such critical items to ensure best food safety practice. In the case of smoke alarms and torches, a healthy supply of batteries is required for safety and security reasons. Peripheral devices such as wireless mice and keyboards can cause frustration when running out of power without warning, so it is always advisable to keep plenty of spare batteries nearby to cover any eventuality.