Guest On-Board Battery Charger 20A / 12V - 2 Bank - 120V Input. Our newest generation On-Board Marine battery chargers include leading advancements in digital charging technology and waterproof design/construction. Every Guest charger has a dedicated charging sensing and control per bank. The easy to read graphics indicates the status of each battery bank through the charging process. Specifications for Guest On-Board Battery Charger 20A / 12V: Manufacturer: Guest Color: Black Amperage: 20 amps Voltage: 120 volts Features of Guest On-Board Battery Charger 20A / 12V All high frequency digital charging technology Fully automatic 5-stage performance charging Dedicated battery charging sensing and control per bank Expanded LED charge status monitor Wiring and battery fault detection Auto-maintain energy saver mode Up to 40 percent lighter 100 percent Waterproof (IP67) and shock resistant for all fresh and saltwater applications All models are pre-wired for easy installation For all 12 volt flooded and AGM lead acid batteries Built-in safety: reverse polarity over-current over-voltage over-temperature and ignition protection. In-line fuses for maximum DC wire protection. 2 year warranty Package Contents: Guest On-Board Battery Charger 20A / 12V Guest 2720A: On-Board Battery Charger 20A / 12V - 2 Bank - 120V Input