OptiMate TS-121 Battery Tester


The OptiMate TS-121 is a Cranking & Alternator Tester for 12V batteries. The ultimate pocket tester for on-vehicle battery performance that every service technician or gearhead should have! Test state of charge, cranking power, and alternator voltage.

In stock

SKU: TS-OPT-121 Category: Tag:

Optimate TS-121

OptiMate 12V Battery Tester TS-121

This pocket-sized premium tester designed by TecMate is solid, reliable and easy to use. Simply connect the clips to your 12V LiFePO4 battery or connect to an installed SAE battery lead, then:

  1. Check battery charge level. A low battery cranks (starts engine) poorly.
  2. Start engine. The OptiMate TEST unit records and indicates (for 20 sec) the lowest start volts.
  3. With engine running, verify charging voltage from alternator and voltage regulator.

TIP: Low charge voltage causes poor battery performance. Too high charge voltage causes excessive gassing and will eventually damage a lead-acid battery. Too high charge voltage is FATAL for a LiFePO4 starter battery!

Other Details

  • Microprocessor accuracy; Fully sealed.
  • Industry standard SAE 2-pin connector.
  • Easy to follow instructions on rear panel of the tester.
  • Includes Testing unit itself and the wire clamps to connect to your battery.
  • Attaches to any SAE battery cable that you might have on your bike or car.

Proposition 65 Warning

WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov

Additional information
Weight 0.5 lbs
Dimensions 7 × 6 × 4 in
Product Weight

0.35 lbs

Product Size

6.5 x 3.75 x 1.25 in

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