Review on 🔋 Schumacher SC1319: Ultimate Smart Battery Charger/Maintainer for Cars, Motorcycles, Marine & Power Sports Batteries by Marcelo Montalvo

I used this to charge a car battery that hasn't been used for about 6 months. Before charging, the battery showed 1.7 volts. After about 24 hours of charging, it appears to be fully charged. The indicator lights are a bit tricky to understand as the reversed terminals/bad battery light was initially on but eventually went off and only showed charging and finally the green charging light came on. Curiosity got the best of me. and I immediately voided my warranty by opening it to look inside. I've included some photos of the circuit board inside for those who might be curious as well.