Klarus K2 2-bay USB Smart Charger for 18650, AA, AAA

Two-Way Power: Charge Batteries or Devices

The Klarus K2 is redefining the notion of what a battery charger can be. In addition to charging your batteries, it can also re-purpose them 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.

Crank Up the Amps

Double your charging speed! The K2's beefy 1 amp output is ideal for charging high capacity Li-ion batteries. Simply push and hold the button to crank up from 0.5 amps to a full 1 amp charge rate. It’s a handy option to have when you're in a hurry.

Charges Cells of Any Size and Shape

The K2 has a lightweight, portable body that allows you to throw it in any bag. This helps you take advantage of its battery backup capability. Sliding battery contacts allow it to accommodate almost any cell you can imagine, regardless of size. Intelligent circuitry auto-detects your battery's chemistry and adjusts factors like charging voltage and cutoff.

•  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)
  Li-ion：26650 22650 18650 18490 17670 17500 16340 14500 10440 16340(RCR123A)
  Ni-MH/Ni-Cd：AA AAA AAAA C
• 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
• Use as a power bank capable of charging USB equipment, with an Li-ion battery as the power source
•  -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：
  a). Automatically reactivates “zero voltage” short-circuit protected Li-ion batteries that have
  been completely drained of power
  b).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