ZOLL AED uses ten Type 123 Lithium batteries. It's a consumer grade battery commonly see in camera flashlight. Cost around $30 to replace if buy from Amazon. Th

ZOLL AED uses ten Type 123 Lithium batteries. It's a consumer grade battery commonly see in camera flashlight. Cost around $30 to replace if buy from Amazon. The battery's shelf life is usually in the range of several years, even with the regular AED self-testing.