Ensure your life-saving ZOLL defibrillator is always rescue-ready with the 8019-0535-01 Medical-Grade Replacement Battery. This high-quality, high-capacity pack delivers 10.8V and 5.8Ah (63Wh) of reliable power, engineered specifically for ZOLL R Series and E Series automated external defibrillators (AEDs) and monitors. Guarantee the critical performance of your emergency equipment with this dependable power source.