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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Product Overview

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 (ft.)
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
1.76 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.

Customer Reviews

Based on 3492 Reviews

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Easy to Use100+

Great Value100+


97% of Customers Would Recommend This Item

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