You just set up your equipment for the first dive of your vacation in Saint Somewhere, as you press the activation button on your dive computer it goes through the diagnostic screen and what do you see the Low Batt Icon appears. The worst thing that can happen on a tropical vacation has just happen No Dive Computer. Don't leave on a vacation without a spare battery kit, why ruin a great holiday because of a few dollars in batteries. The Suunto Zoop Novo & Vyper Novo Battery Replacement Kit comes with everything you need to get a proper battery change for your computer. Kit includes a CR2450 lithium battery, battery hatch screws and battery hatch O-ring. Battery kit can save-a-dive when you need it most. If you're planning a dive vacation this is a must for your save-a-dive-kit. Avoid island prices with a fresh batteries!