Performance Tool W2989 12V Battery and Alternator Tester

The Performance Tool W2989 is a simple plug-and-play diagnostic tool that helps you quickly identify battery and alternator problems in any 12-volt vehicle. Simply plug the tester into your vehicle's cigarette lighter socket, and the LED indicators instantly display the status of your electrical system—no complex setup or technical knowledge required.

Key Features:

• Six LED indicator lights provide clear visual diagnostics for both battery and alternator
• Three battery condition indicators show weak, normal, or strong charge status
• Three alternator indicators display low, normal, or high voltage output
• Plugs directly into standard 12V cigarette lighter socket for instant results
• Compact design fits easily in your glove box for on-the-go troubleshooting
• Works on all 12-volt automotive, marine, and powersports electrical systems

This handy diagnostic tool takes the guesswork out of electrical system problems. Whether you're dealing with a slow crank, dim lights, or charging issues, the W2989 helps you pinpoint whether the problem lies with your battery or alternator, saving you time and potentially costly misdiagnosis.