Bests & Worsts Reviews from Amazon

I have 2 BattryMINDers and never had a problem with either. The Genius 10 seemed to have similar features at a much lower price point. Most reviews were positive, but a few complained that the unit caused severe overheating during charging. I usually have good luck with electronics, but not this time. I left it charging overnight. The first hour seemed fine, but the next morning the battery was too hot to touch. Not sure if it is defective or this is an issue with AGM batteries, but I suggest extreme caution when considering this unit. For me this was a total waste. Update 11/21 Just had a 5 year old almost brand new looking Exide that I maintained with a BatteryMINDer die. It actually made it longer than expected. No surprise, as the Arizona heat kills batteries quickly. I replaced it with an ACDelco AGM but before sending the Exide off to recycling, I remembered the NOCO Genius sitting unused since my last near meltdown. With the battery out of the car so it could not cause any damage I connected the NOCO and set it to the recovery setting. It ran though its cycle and I was hoping that I could recover the battery as a functioning spare. No suck luck, the battery actually LOST cranking capacity! At this point the NOCO is a total waste. Case closed! Don't waste your money.