Never be caught out stranded with a dead battery again with an Ultra Pro Battery Tester from Redwater NAPA. Test your battery before it needs replacing with the Ultra Pro Battery Tester which comes with a thermometer and an acid-proof scale. Get an accurate reading regardless of the temperature. A three-colour float tells you if the battery is good, fair or needs recharged. At 50% off, the price is only $11.99 at your local Redwater NAPA dealer – Redwater NAPA.