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Compact black rectangular 12V 3A smart charger with LED indicators and clamps

BatteryJack inc.

BatteryJack inc. 12V 3A Sealed Lead Acid Smart Charger

SKU CH-D7Z0-4Z80T

Charges 6 V and 12 V lead-acid batteries at 3 A with three-stage smart logic and automatic shut-off

  • Charges 6V and 12V lead-acid batteries
  • Three-stage smart charging protects battery health
  • Automatic shutoff prevents overcharging
  • Built-in short-circuit and polarity protection
  • Universal 100-240V AC input for worldwide use

Smart Charger for 6V and 12V Lead-Acid Batteries

This three-stage smart charger delivers 3.0 A to sealed lead-acid packs at either 6 V or 12 V. Automatic voltage detection selects the correct profile, while LED indicators show red during charging and green when the pack reaches float voltage. Built-in protections guard against short circuits, reverse polarity and over-voltage. The unit accepts 100 to 240 V AC input for worldwide use.

Three-Stage Charging Profile Decides Compatibility

The charger follows a constant-current phase at 3.0 A, then a constant-voltage stage at 14.3 to 14.7 V for 12 V batteries or 7.2 to 7.4 V for 6 V batteries, before settling at a float voltage of 13.5 to 13.8 V or 6.7 to 6.9 V respectively. Matching these exact thresholds to the battery specification is the single factor that determines whether the charger will maintain the pack without overcharging.

No Bundled Accessories or Software Included

The package contains only the charger itself; no cables, clamps, mounting hardware or configuration software are supplied. Buyers who need ring terminals, alligator clips or a quick-connect harness must source them separately. Builders looking for a charger with integrated jump-start cables or a digital display will not find those features here.

Highlights

  • Charges 6V and 12V lead-acid batteries
  • Three-stage smart charging protects battery health
  • Automatic shutoff prevents overcharging
  • Built-in short-circuit and polarity protection
  • Universal 100-240V AC input for worldwide use

Specifications

No published specifications for this item yet.

Questions about this item

What does the 3.0A charge rate mean for a typical 12V battery?

It delivers a constant 3.0A current until the battery reaches 14.3–14.7V, then switches to a 13.5–13.8V float stage to maintain full charge without overcharging.

How does the 100–240V AC input and 50–60Hz range affect where I can use it?

The wide input range lets you plug it into mains sockets worldwide without a voltage converter, automatically handling both 50Hz and 60Hz grids.

Will the 120.0 x 60.0 x 38.0mm case fit on my workbench shelf?

The compact enclosure measures 120mm long, 60mm wide and 38mm high, so it sits easily on a crowded bench or mounts in a tight toolbox compartment.

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