KLARUS K2 Dual Slot USB Smart Li-ion Ni-MH Ni-Cd LiFePO4 Battery Charger Power Bank

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Microcomputer control system, charge two batteries simultaneously, reverse polarity, short circuit and over-charge protection.

The Klarus K2 is redefining the notion of what a battery charger can be. In addition to charging your batteries, it can also be re-purposed to serve as a heavy-duty power bank for your USB devices. Simply switch your cord from the input jack to the output, hook it up to your smartphone, tablet, or vaporizer, and fire up that dead device! Revolutionary input/output circuitry gives you the flexibility to store and discharge power any way you want.


  • Microcomputer control system allows each of the two battery slots to charge individually.
  • Capable of charging 2 batteries simultaneously (Ni-MH / Ni-Cd / LiFePO4 / 3.7V Li-ion / 3.85V Li-ion batteries).
  • LEDs display to clearly show charging progress.
  • Optional 0.5A or 1A output charging current.
  • Charger cable DC 5V micro USB port connects directly to either a car charger plug, a computer USB port or other USB charger plug for charging at home or while travelling.
  • Can be used as a power bank, capable of charging USB equipment, with an Li-ion battery as the power source (battery not included).
  • DV/dt control technology to charge Ni-MH and Ni-Cd batteries more fully.
  • Built-in reverse polarity, short-circuit protection, and 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; will not charge a battery that cannot be reactivated.
  • Made of durable ABS (fire retardant/flame resistant) for your safety.
  • Optimal heat dissipation design for long lifespan.


Model K2
Material ABS
Input Power Micro USB DC 5V/2A
Output Voltage 4.35V/4.2V/3.65V/1.48V ±1%
Output Current 0.5A/1A
USB Port Output 5V/1A
Compatible With LiFePO4, 3.7V/3.85V Li-ion, Ni-MH, Ni-Cd
Li-ion: 26650 22650 18650 18490 17670 17500 16340 14500 10440 16340 (RCR123A)
Optimal working environment 5% (0 Deg.C)-90% (35 Deg.C) (fully-laden regular activity)
Storage temperature 0-40 Deg.C
Product Weight 75g
Product Size 115 x 63.5 x 29 mm
Package Contents 1 x KLARUS K2 Battery Charger
1 x USB Cable
1 x User Manual
More Information
SKU ZP3050251111159
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