The Schumacher Electric DSR ProSeries DSR121 4-in-1 12-Volt Fully Automatic Wheeled 15-Amp Battery Charger and 250-Amp Engine Starter is engineered for both professional mechanics and serious DIYers who demand reliability and top-tier performance. Equipped with a powerful 250-amp engine start, the DSR121 delivers fast and effective jump starts for vehicles, getting you back on the road in no time. Plus, its fully automatic operation, managed by an internal microprocessor, ensures optimal battery charging through advanced multi-stage charging, float mode monitoring, and bad battery detection. With a 15-amp fast charge and a 25-amp to 50-amp boost mode, this charger revives even deeply discharged batteries quickly. A 4-amp standard charge and maintain setting handles basic charging. Desulfation mode automatically restores sulfated batteries to working condition.

Product Features:

• 4-in-1 Device: Engine starter, battery charger, battery maintainer, and desulfator
• 250-amp engine start, 25-amp to 50-amp boost, 15-amp fast charge, and 4-amp maintain rates
• Compatible with 12-volt standard, AGM, gel, and deep-cycle batteries
• Powerful enough for SUVs, trucks, and large engines
• 65A flash reprogram mode supplies power during flash reprogramming
• Memory saver mode maintains vehicle settings while the battery is disconnected
• 12V DC accessory outlet powers your 12V devices
• Microprocessor-controlled operation automatically adjust the amperage rate during charging and maintaining
• Float mode monitoring automatically maintains optimum battery charge
• Reverse hook-up protection protects the battery and unit from damage if the connection is reversed
• Digital display, LED indicators, and push-button controls
• Extra-long AC cord (9 feet) and booster cables (7.5 feet) for a 16.5-foot total reach
• 4-gauge, front-mounted booster cables and color-coded clamps allow for superior power transfer and secure connections
• Retractable handle, compact wheels, and metal casing
• In the Box: DSR121 4-in-1 12-Volt Wheeled 250-Amp Engine Starter and 15-Amp Battery Charger, (4) cable clamp cleats, (4) screws, and user manual