SWAROVSKI OPTIK RB AX Visio Rechargeable Battery for RB AX Visio BinocularsThe SWAROVSKI OPTIK RB AX Visio Rechargeable Battery is a rechargeable battery with lithium ion cells. With the RB rechargeable battery, your AX Visio is always supplied with power for your discoveries in nature. Especially when one discovery follows the next, an empty battery should not end your adventure prematurely. With a charged RB battery in your pocket, there are no limits to your outdoor adventures. Features The Swarovski RB AX Visio