Note: This battery is commonly used on commercial aircraft. Powerheart G3 AED TSO Intellisense Lithium Battery - TSOC142A Certified (All Powerheart G3 Models, excluding G3 Pro) (blue) 2 year full replacement guarantee.Important Announcement: We have become aware after-market manufacturers and online retailers are selling unbranded replacement batteries for use with Cardiac Science automated external defibrillators (AEDs). Use of an after-market battery for Powerheart G3 AED will VOID your Cardiac Science AED warranty.