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Nitecore UI2 Dual-Slot USB Charger, for 18650, 21700, 18350, 20700 Batteries
NITECORE UI2 Dual-Slot Intelligent Portable USB Li-ion Battery Charger for 18650, 18350, 20700, 21700 Batteries

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Price: $12.99

Availability: Usually Ships in 24 Hours
Product Code: CHG-NITE-UI2



  • Max charging current of 800mA
  • Intelligent charging mode selection (CC and CV)
  • Lightweight and portable for outdoor charging
  • Charges large-sized batteries like 20700, 21700 batteries & more
  • Micro-USB port is compatible with USB adapters, solar panels, power banks, and more
  • Displays real-time battery level and charging status

Included in the Box

  • NITECORE UI2 charger
  • micro USB charging cable

Dual-Slot Lithium Battery Charger

Powerful and compact, the NITECORE UI2 is a dual-slot portable USB Li-ion battery charger capable of reaching a maximum charging current of 800mA and supports 18650, 18350, 20700, 21700 etc many type and size lithium batteries.

Safe and Intelligent Charging

Its power indicator provides users with real-time battery level and charging status. It also provides multiple charging safeguards to prevent from reverse polarity, overcharge, and overheating.

Portable USB Charging

The UI2 features a micro-USB port compatible with various power sources including power banks, solar panels and USB adapters for quick and efficient charging. Weighing 2.8 ounces, the lightweight design of the UI2 allows you to carry this charger everywhere you go. Measuring 4.94 inches, the UI2 fits comfortably in the palm of your hand and is portable for outdoor applications.


Input DC 5V/2A 10W
Output Voltage 4.2V±1%
Output Current 800mA*2 (MAX)
Compatible with Li-ion/IMR: 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14430, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500,17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 22500, 22650, 25500, 26500, 26650
Dimensions L-4.94"xW-2.34"xH-1.26"
Weight 2.8oz
Average Rating: Average Rating: 4.5 of 5 4.5 of 5 Total Reviews: 28 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 February 25, 2023
Reviewer: craig edwards from carriere, MS United States  

Extremely satisfied

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  0 of 0 people found the following review helpful:
3 of 5 Charged but only one side at a time February 25, 2023
Reviewer: TFH from Middletown, RI United States  
Advertised to charge two batteries at a time but only charged one battery at a time.   Maybe the charger block had insufficient power.  I just expected it to work.

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  1 of 1 people found the following review helpful:
5 of 5 Dual Slot charger...another great product February 11, 2023
Reviewer: Michael Stricker from Longwood, FL United States  
I ordered this charger so that I could charge any of my rechargeable batteries....20700, 18650, RCR123 and it does a great job for less money than other chargers with similar features.  I only wish it used a USB-C cable so that it would compatible with newer phones' cables.

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  0 of 0 people found the following review helpful:
5 of 5 November 2, 2022
Reviewer: Kenneth Smith from RockinghamRoRockingh, Va , VA United States  
Great charger for the money

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  0 of 0 people found the following review helpful:
5 of 5 First USB charger May 11, 2022
Reviewer: Gary Engelhardt from new Hampshire manchester, NH United States  
Works well, wish it was USB-C as that has become the standard, will carry an extra cable for now.

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