The Ermenrich Zing AL45 battery tester is an intuitive tool to quickly check the health of your car battery or uninterruptible power supply (UPS). The tester has two terminals connected to the anode and cathode. The tester is also charged in the same way - no other power supply is needed.

The values ​​read by the tester are displayed on the built-in screen. The upper bar shows the general state of the battery as a percentage. If the value is between 40% and 60%, it is time to think about replacing the battery, and a value below 40% indicates a decrease in battery performance. Any value above 60% is considered good. The screen also shows voltage, internal resistance, and cold crank amps (CCA). The control elements are located below.

Main features:

- Displays the general state of the battery as a percentage
- Measures voltage, internal resistance and cold cranking amps (CCA)
- Charging via the tested battery (no additional power supply required)