TenHutt KRC 840-03U front view shows compact charger for space-saving use.
TenHutt KRC 840-03U rear view with standard U.S. plug for easy setup.
TenHutt KRC 840-03U LED indicators clearly show charging status.
TenHutt KRC 840-03U compact dimensions fit tight workspaces.
TenHutt KRC 840-03U compatible with Ko-balt 40V batteries.
TenHutt KRC 840-03U cooling channel design promotes airflow.
TenHutt KRC 840-03U rapid charging at up to 4A maximum.

TenHutt

TenHutt KRC 840-03U 4.0A Rapid Charger for 40V Ko-balt Batteries

High-performance tools and home improvement made for confident daily results

$56.41

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Why customers choose TaskHolt Tools

Overview

The TenHutt KRC 840-03U is a compact 4.0A rapid charger designed to pair with Ko-balt 40V batteries. It draws power from a standard wall outlet and fits neatly into busy workspaces or garage setups, delivering reliable charging for a range of tools.

Fast, predictable charging

With an output of 42V max and up to 4A, this charger moves compatible packs toward full use quickly. Approximate times include 2.5Ah in about 37 minutes, 4.0Ah in 60 minutes, 5.0Ah in 75 minutes, and 6.0Ah in 90 minutes. Real-world times vary with battery age and temperature.

  • 4A maximum output for faster top-ups
  • Universal input 100-240V, 50-60Hz for global use
  • 44-inch cord length adds flexibility on the workbench
  • US standard plug enables straightforward setup

Compatibility you can count on

The charger is designed for Ko-balt 40V systems and works with a wide range of batteries and regulators, including KB and KRC series models. Expect smooth compatibility with KB 240-03, KB 640-03, KB 240-06, KB 640-06, KB 245-06, KRC40-06, and related KRC chargers.

  • Broad support for Ko-balt 40V packs
  • Seamless use with existing 40V charging tools

Safety, durability, and smart features

Constructed from a tough ABS+PC blend, it includes smart protection to guard against overvoltage, overcurrent, overheating, and short circuits. The LED indicators provide quick, at-a-glance status so you can plan your next move with confidence.

Clear status indicators

LEDs show four states: Power On (steady green), Defective (flashing red), Charging (flashing green), and Charged (steady green). The visual cues help you monitor progress without opening the case.

  • Easy-to-read indicators for charging stages
  • Low-maintenance, simple to monitor

Thermal design for long-term performance

An efficient internal cooling channel design promotes airflow, reducing heat buildup during longer charging sessions and supporting consistent performance across cycles.

FAQ

Q: Is the TenHutt KRC 840-03U compatible with Ko-balt 40V batteries?

A: Yes. It is designed to work with Ko-balt 40V batteries and compatible KRC chargers across KB and KRC lines.

Q: What charging times can I expect for common battery sizes?

A: Estimated times: 2.5Ah about 37 minutes; 4.0Ah about 60 minutes; 5.0Ah about 75 minutes; 6.0Ah about 90 minutes.

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