The only battery in these scopes is a small coin cell battery that is soldered in. These do not need to be removed. See battery information: BATTERY, DRY; 3.0V, LITHIUM MANGANESE DIOXIDE, 225MAH, 20MM DIA X 3.2MM THICK COIN CELL WITH SOLDER TABS, 20.5MM PCB SPACING;CR2032/HF1N
