The BLACK & DECKER BC15BD battery charger and maintainer will get you back on the road in minutes when your vehicle won't start or if your battery needs maintenance. Just connect the battery charger clamps to the battery terminal and press charge. The bench battery charger automatically does the rest for optimum performance. Fully automatic high frequency charging delivers 3 stage charging, automatically switching from fast charge, to top-off, to trickle charge. This bench battery charger is ideal for motorhomes, boats, jet skis, lawn tractors, ATVs, snowmobiles, and vehicles that sit idle for months at a time. Charge and maintain any AGM, GEL, or WET automotive or marine 12 V battery. It's equipped with a digital LCD screen that displays charging status and battery status with easy-to-understand icons. It also features an alternator check to evaluate the battery voltage under load to indicate if the alternator is maintaining battery level.