RECHARGEABLE BATTERIES - The Philips HR03 NiMH AAA batteries have a big advantage: they are rechargeable. This means you don't have to buy a new one every time a battery runs out. RELOAD UP TO 500 TIMES - Philips rechargeable batteries can be recharged up to 500 times before you can no longer use them. DIFFERENT DEVICES - NiMH batteries are particularly suitable for devices that use a lot of power. Think of game controllers, toy cars, cameras and certain camera accessories.