Duracell Ultra Power with Duralock Power Preserve™ Technology is our most powerful alkaline battery. Now it comes with a 10-year guarantee in storage. If you’re using a device that requires high battery output, Ultra Power with Duralock is the way to go.
With Powercheck technology, you’ll always know how much power you have left. Simply press the white circles on each side of the battery to see how much power remains.