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Compact rectangular battery charger with black casing and LED indicator lights

BatteryJack inc.

BatteryJack inc. 6V/12V 3.0A Smart Battery Charger with LED Indicator

SKU CH-S9BY-CVWG5

Smart charger handles 6 V and 12 V lead-acid batteries at 3.0 A with automatic three-stage charging and LED status lights

  • Charges 6V and 12V lead-acid batteries
  • Smart three-stage charging protects battery health
  • LED shows red while charging green when full
  • Built-in short-circuit polarity and over-voltage safeguards
  • Works worldwide on 100 to 240V AC input

Smart 6V/12V Charger

This BatteryJack inc. unit is a 3.0A smart charger designed for 6V and 12V lead-acid batteries. It uses a three-stage charging process with automatic shutoff when the battery reaches full charge. LED indicators show red during charging and green when complete. The charger accepts 100 to 240V AC input at 50 to 60Hz.

Replaces Basic Trickle Chargers

It upgrades from simple constant-voltage chargers by adding constant-current and floating-voltage stages that protect battery health over long periods. The jump is worth it when you maintain vehicles or equipment that sit unused for weeks and need a charger that can stay connected without overcharging. Short-circuit, reverse-polarity and over-voltage protections add safety for unattended operation.

Lead-Acid Chemistry Limits

The charger only supports lead-acid chemistries at 6V or 12V nominal voltages. It cannot charge lithium-ion, LiFePO4 or other battery types because its voltage windows (14.3 to 14.7V bulk, 13.5 to 13.8V float for 12V) are fixed for lead-acid. Maximum output current is 3.0A, so very large capacity banks will charge slowly. Indoor use is implied by the 120.0 x 60.0 x 38.0mm enclosure and AC input design.

Highlights

  • Charges 6V and 12V lead-acid batteries
  • Smart three-stage charging protects battery health
  • LED shows red while charging green when full
  • Built-in short-circuit polarity and over-voltage safeguards
  • Works worldwide on 100 to 240V AC input

Specifications

No published specifications for this item yet.

Questions about this item

What AC input voltage range does the charger accept for wall power?

The charger accepts 100 to 240V AC at 50 to 60Hz with a 1.0A input draw, so it works on standard household outlets worldwide without a voltage converter.

How do I connect the charger to the battery terminals safely?

Attach the clamps to the correct battery polarity — red to positive, black to negative — then plug the unit into AC power; the built-in polarity error protection will alert you if the connections are reversed before charging begins.

When should I expect the charger to stop charging automatically?

The smart charger switches to float mode at 13.5 to 13.8V for 12V batteries or 6.7 to 6.9V for 6V batteries, and the LED turns green to indicate a full charge, so it can be left connected for maintenance without overcharging.

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