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Compact black rectangular charger with LCD screen and hook attachment

BatteryJack inc.

BatteryJack inc. 6V & 12V Universal Battery Automatic Float Charger Maintainer car electronics accessory

SKU CH-0N43-WR78H

Automatically senses 6V or 12V lead-acid batteries and maintains them at .75 amp with an LCD voltage display

  • Product typeWired Car Charger
  • Automatically detects 6V or 12V batteries for versatile charging
  • LCD shows measured voltage and charge-level bar graph for clear status
  • 75 A automatic float mode maintains batteries without overcharging
  • Multiple protections guard against short circuit, reverse polarity, overcharge and overheat
  • Hook attachment hangs unit outside the work area for safety

Smart charger maintainer with LCD

This automatic float charger maintains 6V and 12V lead-acid batteries in cars, RVs and motorcycles. It senses the battery voltage and selects the correct mode without user input. A built-in LCD shows the measured voltage and a bar-graph charge level. Digital prompts guide the charging and maintaining process.

Hook attachment and safety protections

A hook lets the unit hang outside the work area for safety and convenience. The charger is fully protected against short circuit, reverse polarity, overcharge and overheat. It delivers 750mA charging current at 7.2V for 6V batteries and 13.9V for 12V batteries. The automatic operation prevents overcharging during long-term storage.

Mains input range and build quality

The unit accepts 105-125V AC at 60Hz or 220-240V AC at 50Hz for worldwide mains compatibility. Electronic circuitry controls the float charge cycle for reliable maintenance. Buyers needing faster charging for large-capacity batteries will find the 750mA rate insufficient. The wired design requires access to a mains outlet near the vehicle.

How it compares

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

Price $22.99
Typical for this category: the median of 2,768 items is $21.99.

Specifications

Product
Product typeWired Car Charger

Questions about this item

Will the 750 mA output eventually need a fan or heatsink replacement?

The unit has no user-serviceable cooling parts; its over-temperature protection simply shuts off the 750 mA charge current if the case gets too hot.

What stops the charger first during a long maintain cycle — the 13.9 V float limit or the over-temperature guard?

The 13.9 V float voltage is reached first; the maintainer then holds that level and only invokes over-temperature protection if ambient heat pushes the case beyond safe limits.

How much heat or fan noise does the 0.75 A maintainer produce when left plugged in 24/7?

It runs silently with no fan; the low 750 mA current keeps the enclosure barely warm even after days of continuous float charging at 13.9 V.

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