Review on ABLY Car Battery Charger: 12V/8A 24V/4A Automatic Smart Charger with LCD Display and Pulse Repair - for Car, Lawn Mower, Motorcycle, Boat, SUV and More by Derek Davie

It's just dangerous. The biggest issue I had was that regardless of whether the device was plugged in or not, the clips would create an alarming spark every time they were plugged in and unplugged. This is very dangerous, especially if gases are released from the battery during charging. When turned off. BOOM. Poorly. Another small annoyance: After unpacking, I was very disappointed at how short the cables are. Just two feet of cord on both terminals and power cord. The clamps feel flimsy, and worst of all, they don't have any "prongs" inside to clamp the battery terminals. They're just round and smooth and they keep slipping and detaching from the car battery if you don't get them right. Batteries with side terminals are a nightmare to connect. and forget about trying to connect it to the battery when it's not in the car. Thank goodness for Revain's return policy. Go back immediately.