Scubapro Uwatec Aladin Tec / Prime / 2G / One Computer Battery Replacement Genuine user replaceable Lithium Aladdin Battery Kit. A must for your Save-A-Dive Kit: Don\'t leave on a vacation without a spare battery kit! Kit includes: 1 x Brand new sealed CR2450 3.0V Lithium cell battery 1 x Original manufacturer Battery O-Ring - important for the security of your dive computer from leaking water. Fits the following Uwatec / Scubapro dive computer: 2G Prime Tec One Tec 2G 3G Tec 3G Matrix