Keep all your devices running for longer with these Duracell Ultra Power AAA batteries, Duracell's longest lasting batteries ever. Plus, with clever Powercheck technology, you'll always know how much power is left, which means you can choose to power a lower-drain device if there's not much energy left. That way, you can waste less and avoid unnecessary interruptions when the batteries die. Simply press the white circles to check when it's time to replace them. Features and Benefits Powercheck indicators - These let you know how much battery power is left. You can then not only avoid the batteries dying when you're in the middle of something, but choose to put them in a different device instead to make the most of the last bit of energy. Powerful - These Duracell batteries are designed for use in high-drain devices, such as electric shavers and games controllers, as they harness more power than regular batteries. If you use them in a torch, they'll make it shine longer and brighter. Duralock Power Preserve technology - Keeps unused batteries powered up for up to 10 years in storage. Specifications Pack of 8 AAA alkaline batteries Best for high-drain devices Powercheck indicators Leakage prevention