Similar to Deltran Battery Tender BT-Twin / Chargers

Battery Maintenance System Performs a seven stage Automatic charging cycle Chargers and maintains your 12 volt Rotax battery or other 12 volt batteries such as Gel Lead Acid and MF batt

This is a fully automatic battery charger with 7 charge stages. Automatic charging protects your battery from being overcharged so you can leave this connected indefinitely. Atomic Endorsed with Polarity Protection and a 5 year warranty.