Black & Decker 10 Amp Simple Battery Charger is designed to efficiently prolong overall battery life. It features a simple selector dial for easy operation which allows dialing into a function and letting the charger do the rest which ensures longer life for the battery. This charger has a durable design with heavy-duty cables and clamps for increased durability in charging environments. It offers fully automatic process that charges up to 50 percent faster than other conventional chargers. This charger contains a LCD screen that displays the battery voltage, charge rate and battery diagnostics. It provides alternator diagnostics, cord or cable wrap and clamp storage that allows the unit to store safely as well as compactly. This charger consists of high frequency charge process that charges 12V batteries quickly and a reverse polarity alarm which warns against improper connections to battery.