Oceanic Dive Computer Battery Kits.Most Oceanic Computers offer user replaceable batteries. Select your computer model from the drop down list to order a battery kit specific to your computer. Kits include battery, O-ring, silicon grease and battery hatch screws (if applicable). Instruction for replacing your battery are located in the back of your computer manual. A digital copy of your computer manual can be found here: Oceanic Dive Computer Manual DownloadsNote: Pictures above are for illustration purpose only.