The Battery Tender Battery Charger 081-0158 is a compact and lightweight charger designed to keep 12-volt lead-acid batteries at optimal levels. It features a 4-step charging program that automatically switches from full charge to float mode to prevent overcharging. The charger also has a quick-connect harness for easy attachment to the battery and includes spark-proof technology for added safety. It is suitable for use on motorcycles, ATVs, snowmobiles, and other vehicles with 12-volt batteries. The Battery Tender Battery Charger 081-0158 is a reliable and efficient solution for maintaining battery health.