Review on 🔋 Innova 3721 Battery and Charging System Monitoring Device by Michael Baird

Well made and durable. It turns on instantly and is constantly updated. Displays the voltage with two decimal places. Comes with great instructions on how to check your loading system printed on a large card that came in a blister pack so it's big and strong enough to fit and survive in the glove box. I got this for my daughter's 2009 Civic which doesn't have a voltmeter. I used it to make sure the alternator was putting out 14.58 volts, but the battery would drain to less than 6 volts on a winter night. The car doesn't drive much, so I didn't want to buy a new battery until spring. I've put it on Battery Tender now. Even if your charging stick isn't working right now, it's worth having in any car without a voltmeter. This can prevent you from paying for a battery or alternator that you don't need.