Product Description Voltflow 20Amp Smart Battery Charger & Maintainer 12-24V VF2024BC 9-Stage Lithium Capable – Multi Amp – High Output – Fan Cooled VoltFlow’s VF2024BCMulti Amp Smart Battery Chargeris a high output, fan cooled charger featuring repair mode andaselection of 3 outputs that best suits your batteries’ capacity,ensuring safe and optimum charger outputs. When repair modeis selected, the user can recover very flator sulphated batteries ( down to 7 Volt) – lead acidbatteries only. Ideal for all size batteries from mowers to caravans including buses, trucks, 4WDs, vans, cars, farm machinery and boats. Features : Automatic detection and identification of 12V and 24V batteries without manual selection, when the charger detects the battery is fully charged, it automatically enters trickle charging ensuring you battery is maintained in peak condition. Temperature compensation to prevent overheating. Minimum Starting Voltage is 7 Volts.