Charging unit is easy to use and works great. Works perfectly with my 2005 corvette. Simply plug it in to the cigarette lighter and it does the rest.

Diehard is the no bells or whistles. It works wonderfully. It’s also good to keep up with demands when you have a modern corset.

I am surprised that this reputable brand sells something like this. I have a prius c car which has been idled for a long time, so the battery probably is very dead. The tips go on crooked and won’t thread tightly.

It charges but does not recognize when battery is charged. It says on the back don't overcharge. As soon as the charger starts pulsing the green light to indicate a fully charged battery, the high-pitched whistle starts. Didn't keep the pickup truck b...  Read More

This is not smart at all. Not worth the hassle. Don’t waste your money.

What really got my goat is amazon, chose to refund my money on a gift card. Called back and requested call back. Would not buy again.