Defibtech Lifeline™ or Lifeline AUTO AED Lithium 9V Battery - (for self checks) - AED Superstore - DAC-410
Amazon.com: 9V 6F22 Batteries, High-Power Batteries, Long Battery Life, 9 Volt Carbon Batteries, 3 Years Shelf Life, Leak-Proof 9V Batteries Suitable for Smoke Detectors and Other Electronic Products (2-Counts) : Health &
9 VOLT BATTERY, ZINC-CHLORIDE | All Electronics Corp.