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Klarus C4 4-bay Charger for Li-ion, NiMH, NiCd Batteries

Klarus C4 charger front view
Packaging for Klarus C4 charger
Klarus C4 charger front view
Packaging for Klarus C4 charger
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Klarus C4

4-Bay Universal smart charger

A smart charger for all of your Li-Ion, NiMh and NICd rechargeable batteries, the Klarus C4 is as compact and powerful solution to all of your battery charging need. This charger features 4 charging ports that are capable of charging all of the most popular styles of rechargeable for home or business use. An integrated Microcomputer control system keeps the batteries charging quickly and safely, preventing overcharge by detecting the voltage and capacity of any compatible battery. With a wide input voltage range the C4 can be used worldwide with either AC or DC power, making this charger perfect for travelers in need of portable power.

  • Microcomputer control system allows each of the two battery slots to charge individually
  • Capable of charging 4 batteries simultaneously (Ni-MH/Ni-Cd/ 3.7V Li-ion)
  • The LEDs will clearly display the charging progress of each battery
  • Charging voltage is from AC100V to 240V or DC12V, safe to use on all power grids in cities worldwide
  • -dV/dt Control technology to charge Ni-MH and Ni-Cd batteries more fully
  • Built-in reverse polarity and short-circuit protection
  • Features over-charge protection to prevent battery damage. Automatically stops charging when complete
  • Auto-activation function:
    • Automatically reactivates "zero voltage" short-circuit protected Li-ion batteries that have been completely drained of power
    • Three corresponding indicator lights will flash simultaneously when attempting to charge a battery that cannot be reactivated
  • Made from durable ABS (fire retardant/flame resistant) for your safety
  • Designed for optimal heat dissipation, long lifespan
  • Input Voltage: AC 110-240V 50/60Hz DC 12V 1A
  • Output Voltage / Current:
    • 4.2V±1%V, 375mA x4 750mA x2
    • 3.6V±1%V, 375mA x4 750mA x2
    • 1.48V±1%V, 375mA x4 750mA x2
    • NOTE: Slots 1 and 3 constitute one group; Slots 2 and 4 constitute the other group. When using one battery in a single group, the battery charging current is 750mA
  • Compatible with:
    • Li-ion: 26650 22650 18650 18490 17670 17500 16340 14500 10440
    • Ni-MH, Ni-Cd: AA AAA AAAA C
    • LiFePO4: 16340(RCR123A)
  • Size: 138mm-96mm-36mm
  • Weight: charger weight 165; charge cable weight 40g
  • Optimal working environment: 5%(0°C)-90%(35°C) (fully-laden regular activity)
  • Storage temperature: 0°C-40°C
Charge Channels:4
Supported Chemistries:Li-Ion, LiFePO4, Ni-Cd, Ni-MH
Compatible Battery Sizes:10440, 14500, 16340 / RCR123A, 17500, 17670, 18650, 22650, 26650
Charge Current:750mA
Batteries Included:No
Warranty:Battery Junction 30-Day Warranty, Klarus 1 Year Warranty
Return Policy:Battery Junction Return Policy
Product Weight:5.8202oz
Product Dimensions:5.43307" (L) x 3.77953" (W) x 1.41732" (H)
Country of Origin:CN
2 Reviews
50% (1)
50% (1)
0% (0)
0% (0)
0% (0)
Lakewood, CO
Fast Charger!
January 14, 2020
I purchased rechargeable RCR123 batteries for my security cameras (they do go through std CR123 quite often) and had a tough time deciding which charger to get. Without any reviews at that time, I figured I couldn't go wrong with getting the Klarus 4-bay charger to go with the Klarus RCR123. It turned out to be a good decision. The Klarus 4-bay charger is quick to recharge a set of 4 RCR123 from 8-10% to 100% in less than 3 hours, and from 50% to 100% in an hour. It would accept multiple battery sizes in any one of its 4 bays for charging simultaneously. The LED bar above each bay lets you know charging status and will remain fully lit when charging is complete. Overall, the Klarus 4-bay Charger is highly recommended!
By John R.
Fredericksburg, VA
What a deal!
September 17, 2015
Getting the new Klarus C4 charger has been a good experience. I know I'm getting quality when I buy Klarus, and I did again. This unit will charge pretty much any rechargeable battery on the market today. It's 4 slots, gives the ability to charge 4, or just 1 if need be, as they all act individually. You can charge a AA in 1 slot, then a 18650, a RCR123, and AAA all at the same time. The unit it is a tad big, and from the description, I thought I was getting a 12V DC charger along with the AC adapter, but that wasn't the case. It looks like my Nitecore 12V adapter will work, but I'd need to double check. For what you get for the price, you'll be pleased.
ProsAble to charge 1-4 batteries of various sizes and chemistries. Klarus quality.
ConsBulky unit; no DC adaptor
1 Question & 1 Answer
from Passumpsic Vermont asked:
October 2, 2017
1 Answer
This charger only comes with an AC power cord and does not appear to be able to be used in a car.
Customer Service
on October 12, 2017

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