SECTION 4 TEST THROUGH THE TEST BUTTON Soon after the battery tester is powered on, the real-time voltage of the battery will be displayed on the screen, and the Bluetooth icon will flash. Figure 4.1.1 Press the Test Button , and wait for several seconds. The corresponding Battery Voltage Indicator (FULL / MEDIUM / LOW) and Battery Health Indicator (GOOD / MEDIUM / BAD) will light up to show the test result. BT20 BT20 BT20 BT20 Figure 4.2.1 EN I 12