Rally 7542 12V Vehicle Battery and Alternator Tester
The Rally 12 Volt Battery and Alternator Tester will work on cars, RVs, boats, and more. This plugs directly into any 12 volt port checking your battery and alternator. When checking the battery' one of three LED indicators will show the vehicle's battery condition as either: Charged, Recharge, or Dead. When checking the alternator one of the three LED indicators will show the vehicles alternation condition as either: Too High, Normal, or Too Low. The Rally quick check Battery and Alternator also has a compact design for easy storage, and a 2 year limited warranty. You'll always be in the know with the Rally 12 Volt Battery and Alternator Tester.