Criteria � When the voltage increases, the battery mark disappears on the monitor LCD. Check the AC detection level by this disappearance. � Connect the constant-voltage power supply and check the voltage at Level 3 ("no battery capacity" indication). Then, turn off the power, increase the voltage by 0.1V and change the power switch from OFF to ON. The voltage is under the following conditions now. Measure the voltage. (When changing the voltage, turn off the power.) �Level 1 : The battery mark is turned off on the monitor LCD. �Level 2 : The battery "half" mark lights on the monitor LCD.