Opti Mate 1 DUO, the ‘no brainer’ battery maintainer for the hi-technology battery in your performance power sport vehicle – Guarantees healthy lithium or lead-acid batteries! Features Maintains any type of 12V lead-acid or 12, 8V lithium battery from 2 Ah-20 Ah Four-step program Low-volt start of 4V Delivers a constant 600m A current Tests & delivers only what the battery needs without ever overcharging or undercharging Premium charge accessory cables are included with every charger Ideal for AGM, GEL & STD 12V batteries & Lithium (Li Fe PO4) 12.8/13.2V batteries from 2 – 20 Ah Charging Amps: 0.6A (constant current) Charging Volts: nominal: 12V & 12.8V range: 4V – 14.4V Operation: Fully automatic Comes with EU-plug