Guest On-Board Battery Charger 10A / 12V - 1 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 10A / 12V: Manufacturer: Guest Additional Features: 12v Amperage: 10 amps Voltage: 120 volts Features of Guest On-Board Battery Charger 10A / 12V Charger Output Voltage: 12v Charger Output - Amps: 10 Amp Charging Banks: 1 Portable: No Charger Input - Voltage: 120V Package Contents: Guest On-Board Battery Charger 10A / 12V Guest 2710A: On-Board Battery Charger 10A / 12V - 1 Bank - 120V Input