This battery meter is designed to measure the battery condition by plugging it in cigarette lighting socket. Before igniting the engine, the meter shows 12 v on the screen. As the engine is ignited, 13 v ~ 15 v should appear on the screen, indicating it is in normal operating condition.
If an engine fails to ignite, the meter will display 10 v or less on screen. It is then necessary to recharge, or replace the battery. After the engine runs about one hour charging the battery, it is back to operating condition.
Note:
l The battery meter is applicable for 12 v ~24 v car cigarette socket.
l The meter is 0.5 A fused. If there is no display, unscrew the meter connector to check the fuse. Replace the fuse when necessary.
