Seller notes

The American Optical Corp. 7181 Duo-Check Battery and Coolant Tester is a tool designed to quickly and easily test the condition of both a vehicle's battery and coolant. Here's a breakdown of its functionalities and potential applications: Functions: Battery Test: Likely measures voltage to determine the battery's health and ability to hold a charge. Might have different readings or indicators to specify if the battery is good, weak, or needs replacement. Coolant Test: May measure the coolant's ...

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