PHYSIO LP1000 LMnO2 Non Rechargeable Battery – This battery is essentially maintenance free, as the battery is non-rechargeable and enjoys a long battery life right out of the box. The battery has a gray button that is a test gauge for the battery. The Non-Rechargeable Battery Kit includes; Battery Pak, Discharger, and Instructions on safe disposal of Battery Pak. Battery must be completely discharged before recycling. Battery made specifically for the Physio-Control LIFEPAK 1000 Defibrillator. We recommend having a fully charged spare battery available.