Philips PowerLife alkaline batteries Philips PowerLife alkaline batteries are ideal for use in high drain appliances such as bicycle lights as well as many other uses. They use expanded graphite technology which provides a quicker, less resistant route for the current to pass through the cell to power the appliance. In this way, they last much longer than standard alkaline batteries from lesser-known brands. Pack of Four Size: AAVoltage: 1.5V These Philips batteries are guaranteed free from harmful heavy metals such as Cadmium, Mercury and Lead. About Philips Since introducing their first light bulb in 1891, Philips have been leaders in electrical innovation everywhere from your home to your hospital and your bicycle too.