Discover Duracell Ultra Power Duracell Ultra Power is our most advanced battery with Powercheck. Duracell Ultra Power gives you reliable performance & long-lasting power in broad range of everyday devices. Duracell Ultra Power battery uses unique Powercheck technology that lets you test the remaining power: just press the white dots on the battery to see how much power is left. Powercheck The Powercheck technology makes it easy to check how much power is left in each battery to avoid unnecessary interruptions in your device usage & enables you to re-use your batteries in low drain devices even when they no longer work in high drain devices (keep batteries together & not mix with unused batteries in second device). You simply press the white dots on both ends of the battery & see the remaining amount of power on the energy meter. Duralock Duralock technology keeps unused Duracell batteries fresh & powered even after up to 10 years in ambient storage. Device performance Duracell Ultra Power makes your torch shine longer & brighter. Suitable for all devices Our best battery, suited for everyday devices with extra performance for high drain devices. You can rely on the battery during both everyday activities & special events as it powers not only shavers, toothbrushes, CD players & remote controls but also digital cameras, portable game consoles, flashlights, motorized toys, etc.