The Cressi Battery Kit includes gasket and battery for Leonardo and Giotto Dive Computers. The last thing you want to do, is to have to abort a dive because of low batteries in your dive computer. Having this in your bag as a spare, could prevent a ruined dive trip! The kit includes a single cell 3.0 volt lithium CR2430 battery and o ring compatible with Leonardo and Grotto dive computers. Make sure you replace your battery, before a dive, when the low battery icon on your dive computer appears and you'll never have to abort a dive because of battery issues again. The best thing about our battery kits are that you can replace them yourself without having to see a profession about a special equipment service. Simply unscrew the battery cover, remove the lid and check for traces of corrosion. If there are none, remove the old battery and replace with the new one ensuring it's in the same way as the old one. Close the cover, making sure not to over tighten the battery cover and that the instrument is water tight, and you're good to go again! Features Single cell Includes 3.0 Volt Lithium CR2430 Battery and O-Ring Note: When replacing the battery, make sure you reset the date and time in order to record correct diving information. Do not reset the battery when de-saturation is in progress as all information relating to de-saturation will be cancelled. Note: if there are signs of corrosion on or around the old battery, make sure you get it checked by an authorised service centre before use. PLEASE NOTE: Adreno cannot sell Cressi products to customers outside Australia at this time.