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The smart choice for a battery sales counter – check new batteries before sale or test returned batteries! Easy to use! Connect clips to the battery and read the result. The OptiMate battery tester’s microprocessor draws very low power from the battery itself to determine and display battery status. Tests all 12V Lead-acid and 12. 8V / 13. 2V LiFePO4 (LFP) Lithium batteries and displays result that can be used to convey information to customer. A premium tester designed by TecMate. 3-year limited replacement .