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Compact black rectangular charger unit with LCD screen and attached cables

BFKK

BFKK 4A Smart Car Battery Charger 6V 12V car electronics accessory

SKU CH-E1WH-PW4RD

Fully automatic 8-stage charger maintains 6V and 12V lead-acid batteries from 4 to 120Ah with LCD status display and multi-protection safety features

  • 8-stage automatic charging protects battery health
  • 6V and 12V compatibility suits motorcycles, cars, and small trucks
  • LCD screen shows voltage, current, mode, and charge percentage
  • Multi-protection against reverse polarity, short circuit, and overheating
  • 72-hour safety timer and 50 A fused ring connectors add confidence

Smart 4A charger for 6V and 12V lead-acid batteries

The BFKK 4A smart charger handles 6V and 12V Pb, SLA, VRLA, GEL and AGM batteries from 4Ah to 120Ah. It suits cars, motorcycles, lawn mowers, boats, ATVs, scooters, snowmobiles, small trucks and electric tools. An eight-stage MCU process covers diagnosis, desulfation, soft start, bulk charge, absorption, test, recondition and float. It stops automatically when full and restores the last settings on power-up.

Eight-stage automatic process with LCD monitoring

Charging proceeds through diagnosis, desulfation, soft start, bulk charge, absorption, test, recondition and float without user intervention. The LCD shows voltage, current, mode, battery type and percentage in 25% steps up to 100%. A 72-hour safety timer limits unattended operation. The unit is not for lithium chemistries, high-capacity banks above 120Ah or applications needing faster than 4A charge rates.

Ring connectors with 50A fuse and multi-protection

Ring terminals include an integrated 50A fuse for secure, permanent mounting on vehicles in storage. Protection covers reverse polarity, short circuit, over-voltage, over-current, over-charge, over-discharge, overload and overheating. Constant pulse current maintenance prevents overcharge during long-term float. The charger is not suited for quick jump-starts, lithium packs or workshops needing adjustable current beyond the fixed 4A output.

How it compares

Measured against everything we stock in Car Audio Accessories & Wiring, at today’s prices. Recalculated every night.

Price $66.99
Pricier than about 77% of the 2,768 comparable items (median $21.99).

Specifications

Product
Product typeOther

Questions about this item

Should I choose the 6V or 12V setting for my battery?

Select 6V or 12V to match the nominal voltage printed on your lead-acid, SLA, VRLA, GEL or AGM battery. The charger supports both voltages automatically once the correct mode is chosen.

What does the 4A rating mean when the charger is connected to a vehicle battery?

It delivers up to 4 amps during the bulk-charge stage, so a typical 4–120 Ah battery reaches full charge in several hours before the unit switches to float maintenance.

How does the 8-stage process protect the battery during long-term storage?

After bulk and absorption stages, the MCU runs a test, recondition and float sequence, then maintains the battery at 100 % without overcharging for year-round readiness.

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