Rally 7542 12V Vehicle Battery and Alternator Tester

• Works on cars trucks, RVs, boats, and more
• Plugs directly into any Vehicle's 12 volt port and LED lights will tell the condition of the battery and alternator
• Voltage range 2 Volt - 15 Volt DC
• Compact design for easy storage
• 2 year limited warranty

I bought this item almost two years ago and have since used it on several vehicles and have never had an issue. Perhaps the other reviewer purchased a defective unit, usually you get what you pay for, in this case I am satisfied.

Buy Rally 7542 12V Vehicle Battery and Alternator Tester Now

I bought this unit at a local store as a Christmas stocking suffer but was curious about using it. I placed it in the 12V port of my Toyota Rav4. I came back later and started the vehicle. In less than ten seconds there was smoke coming out of the port. I pulled the unit out as fast as possible. The very end of the tester was gone. Vaporized. This is the primary port in my vehicle and I use it often with many electronics and have never had any problems with this port. I wonder what may have happened if I had left the vehicle for even a moment. I definitely cannot recommend this product.