Genuine Philips M3863A battery for Heartstart FR2 and FR2+ install by dates of at least 2021, lightly used all will have at least 50% charge left, displays "good battery" when checked. Check our other listings for complete defib packages, all with in date pads and strong batteries Philips FR2+ Package Philips FRx Package Philips MRx Package Cardiac Science G3 Package If there is a particular defib you want that we don't have in stock let us know. UK's Number 1 seller of refurbed defibs, sold over 700 different defibs in 5 years.