Harbor Freight Tools


4 Amp Fully Automatic Microprocessor Controlled Battery Charger/Maintainer

This 4 Amp car battery charger is fully automatic for trouble-free charging

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Available Online by Jan. 3

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Microprocessor technology gives this 12 volt car battery charger the power to charge most 12V batteries including deep-cycle, gel and AGM batteries. Fully automatic microprocessor control feature adjusts the amperage rate to charge and maintain batteries quickly and safely with one press of a button. High frequency current pulse can be used to recondition car batteries that are weak, sulfated or deeply drained.

  • Microprocessor control adjusts current to match battery type and condition
  • High frequency technology is over 20% more efficient and over 50% lighter than conventional charging systems
  • Winter mode for specialized battery charging in winter weather conditions
  • Large easy-to-read LCD display shows readouts for Charging Mode, Battery Capacity, Battery Voltage, and Charging Faults
  • Automatically switches to maintenance mode when battery is charged
  • Heavy duty 7 ft. 14 gauge cables

Important Information

  • This item is subject to a 20% restocking fee

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Clamp material
Reverse polarity protection (y/n)
AC Volts
Amperage (amps)
Conventional , AGM , Gel, Deep-Cycle
Cable gauge
14 AWG
Cable length
21 in.
Product Height
2-1/4 in.
Product Length
6-1/4 in.
Product Weight
1.25 lb.
Product Width
3-1/4 in.
Shipping Weight
1.65 lb.
CA Residents
Warning - Prop 65 Info
Note: Specifications are approximate and subject to change

We guarantee this product to be free from defects in materials and workmanship 90 days from the date of purchase. Limitations apply.