Heart Start AED Defibrillator Replacement Battery.

• Non-rechargeable
• The battery typically lasts 4 years installed keeping your Philips AED in a "ready to use" condition as well as running mission critical self tests
• The battery has the capacity to deliver a minimum of 200 shocks or 4 hours of patient monitoring
• 5 year shelf life (new and uninstalled). The battery expected expiration date is 4 years from the date you install your battery as long as you install the battery within the "install by date"