Voltage / Capacity: 12.0 Volt 4200 mAh
Dimensions: 170mm (L) x 64.6mm (W) x 33mm (H)
Approximate Weight: 335g
Battery Chemistry: Lithium Primary (Non-rechargeable)

This compatible (non-original) medical battery is for use in the Heartstart FR2 Automated External Defibrillator (AED), as a direct replacement for the original battery part number M3863A

The FR2 AED is end of life and discontinued, and accessories are rapidly becoming unavailable, but you can keep your FR2 running with this replacement compatible battery.