CRAFTSMAN 12A Battery Charger & Maintainer – 6V/12V Smart 4-in-1 with Desulfation and Digital Display

The CRAFTSMAN CMXCESM258 is a fully automatic 4-in-1 battery charger and maintainer that quickly charges, tests, and revives 6V and 12V vehicle batteries with smart, microprocessor-controlled charging.

Compact but powerful, the CMXCESM258 provides rapid 12A charging plus lower-rate maintenance modes for standard, AGM, deep-cycle and 12V LiFePO4 batteries. Built-in safety features and a digital display simplify use in a home garage, workshop, or seasonal storage situation. The unit automatically detects voltage and adjusts charging stages so you don’t have to monitor the process constantly.

How does this charger revive a deeply discharged battery?

The charger uses a desulfation and multi-stage charging process to help restore batteries that have lost capacity from sulfation or long storage. Its microprocessor logic ramps voltage and current safely while monitoring battery response, which improves the chance of recovering weak batteries without user intervention.

• 12A rapid charge for faster replenishment of depleted cells
• Desulfation mode to break down sulfate buildup on plates
• Automatic multi-stage charging to reduce overcharge risk
• Bad-battery indicator to flag non-recoverable batteries

What safety and convenience features protect me and my vehicle?

Safety features guard against common user errors and electrical faults while convenience features make hookups and operation straightforward. Reverse-polarity protection prevents the unit from operating if clamps are reversed, and LED indicators plus a digital display communicate charge status clearly.

• Reverse hook-up protection to prevent damage from misconnected clamps
• Digital display and LED indicators for clear status updates
• Push-button controls for simple mode selection
• 6-foot AC cord and 6-foot battery cables for a 12-foot working reach

Which battery types and vehicle applications are supported?

This model supports a wide range of battery chemistries used across cars, trucks, motorcycles, ATVs, boats and off-grid equipment. It senses whether the battery is 6V or 12V and adapts the amperage and algorithm to suit standard lead-acid, AGM, deep-cycle and LiFePO4 batteries.

• Compatible with 6V and 12V batteries
• Works with standard flooded, AGM, deep-cycle and 12V LiFePO4 chemistries
• Suitable for cars, trucks, motorcycles, ATVs, boats and seasonal equipment
• Offers both fast-charge and maintenance/trickle-charge modes

How easy is it to use and maintain this charger?

The CMXCESM258 is designed for everyday users: connect the clamps, choose the mode, and let the charger monitor the battery automatically. Routine care is minimal—keep the unit dry, store cables neatly, and follow the user manual for safe operation and two-year warranty information.

• Microprocessor-controlled automatic operation
• Push-button mode selection and readable display
• Low-maintenance design with durable cables and clamps
• Includes user manual and two-year limited warranty

Who is this for: The CRAFTSMAN CMXCESM258 is ideal for DIY mechanics, homeowners with seasonal vehicles, small-fleet owners, and anyone who needs a reliable, user-friendly charger to maintain or recover 6V and 12V batteries. If you want a single garage tool that charges, maintains, tests and helps restore multiple battery types with clear feedback and built-in safeguards, this unit is a practical choice.