ZIMISI Car Battery Tester, 12V Digital Battery Tester Voltage Meter with LCD Display and LED Indication, Alternator Charging System Analyzer, Battery Monitor for Cars, SUVs, Trucks

【Easy Operation】: This battery tester is easy to operate. You only need to correctly connect the tester to the positive and negative terminals of the battery. The red wire connects to the positive terminal, and the black wire connects to the negative terminal. And you can quickly test the working status of the battery and the generator to determine whether the battery is operating normally. 【Safety Ensured】: The automotive battery tester voltage meter is equipped with reverse connection protection and overvoltage protection systems, which can effectively prevent equipment damage caused by operational errors, extend the service life of car batteries, and make battery testing safer and more reliable.