The PSW-70300A Schumacher 4/20/40/70/300 Amp 12 Volt ProSeries Automatic Wheeled Automotive Battery Charger operates as fully automatic or manually. Charges 12-Volt Standard, AGM, Gel Batteries battery systems. Desulphates weak or aged batteries savi ng you money. Charge Rates Use the charge rate selector switch to select the charge rate or engine starting setting you require: 300 Amp Engine Start - Provides 300 amps for cranking an engine with a weak or run down battery. 20/40 Amp Fast and 70 Amp Rapid charge for charging automotive, marine and deep-cycle 12-volt batteries. 4 Amp Slow charge rate intended for charging small batteries such as those commonly used in garden tractors, snow mobiles and motorcycles. Desulfation Mode If the battery is left discharged for an extended period of time, it could become sulfated and not accept a normal charge. If the charger detects a sulfated battery, the charger will switch to a special mode of operation designed for such batteries. If successful, normal charging will resume after the battery is desulfated. Float-Mode (Maintain Mode) When the battery is charged the unit will enter Float-Mode Monitoring.In this mode, the charger keeps the battery fully charged by delivering a small current when necessary. If the battery voltage drops below a preset level, the charger will go back into Charge Mode until the battery voltage returns to the full charge level, at which point the charger will return to Maintain Mode. Product Features Set to fully automatic or manual charging. For 12-Volt Standard, AGM, Gel Batteries Over-sized heavy-duty selector switches 300 Amp engine start 70 Amp rapid charge 40 Amp fast charge 20 Amp fast charge 4 Amp slow (trickle) charge Thermal Runaway Protection Desulfation Mode Rejuvenates older batteries Maintain Mode (Float Mode Monitoring) LED Indicator for charging status Alternator Performance Tester Automatic temperature compensation provides optimum charging and safety in cold weather. 2.25 hour timer with hold position for continuous recharging Large face, clear-view amp and volt meters have easy to read graduated scales. Tubular, chrome-plated handle with rubber grip and unique non-conductive clamp rest 600 amp heavy-duty, chrome-plated steel ultra grip clamps 6-foot heavy duty, commercial gauge welding-grade cables Extra long 9-foot ac line cord High volume cooling fan for efficient cooling and longer duty cycles. Durable steel cabinet with wide-track wheels. Condition: NEW Collection: NUNEATON Lot Reference: RYZ108 User Reference: e7680beda8f5d7e28287d905111b1977