This battery checker is to confirm how much used. The value is just a guide value. Following display, set batteries in accordance with the (+) (-) correct direction. Please remove the battery immediately after finishing check. Cannot measure air battery and secondary (rechargeable) battery.
1.5V single 1 to 5 single-size batteries, 3V 6V lithium battery, 3V coin-shaped battery, manganese 9V battery, button battery