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NITECORE UMS2 Intelligent USB Dual-Slot Superb Battery Charger for AA AAA 14500 16340 18650 21700 20700 batteries and more
NITECORE UMS2 Intelligent USB Dual-Slot Superb Battery Charger

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Price: $28.95

Availability: Usually Ships in 24 Hours
Product Code: CHG-NITE-UMS2

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1x Nitecore IMR3100-35A [Add $16.95]
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Add a Quick Charge 3.0 USB AC Power Adapter [Add $9.99]



  • Capable of charing 2 batteries simultaneously & controlling each slot independently
  • Charging speed up to 3,000mA in a single slot
  • Automatically detects battery power level and selects the appropriate voltage & charging mode
  • LCD display shows real time charging information
  • Built in safety protections to prevent short circuits, overcharging, and improperly inserted batteries
  • Compatible with USB adapters, power banks, solar panels and more.

Included in the Box

  • NITECORE UMS2 Charger

Quick and Efficient Charging

Introducing the NITECORE UMS2 Intelligent USB dual-slot charger designed to recharge your batteries fast, safe and efficiently. The UMS2 will reach a maximum total output of 4000mA when using a 2A output USB power adapter. When the charger is powered or connected to quick charge (QC) power adapter, the screen will show “Quick Charge” and the single slot will achieve a max output of 3000mA.

LCD Display with Real-time Charging Information

A brightly lit LCD display reports real information including battery health, charging time, charged volume, charging current, battery voltage and type, cut-off voltage and charging mode. The UMS2 offers an energy saving function that activates and dims the LCD display in 10 minutes, when there is no action to the buttons or batteries.

Intelligent USB Charging

The UMS2’s intelligent charging technology automatically detects and applies the appropriate charging current/voltage while allows users to manually adjust the charging current/voltage for specialized battery types. The UMS2 supports various battery types (li-ion/imr/lifep04/ni-cd/ni-mh) and common battery sizes including (18650, 16340,14500).


Input DC 5V/2A 9V/2A / 18W(MAX)
Output4.35V±1% / 4.2V±1% / 3.7V±1% / 1.48V±1%
Output Current QC Mode3,000mA*1 (MAX) 2,000mA*2 (MAX)
Output Current Standard Mode2,000mA*1 (MAX) 1,000mA*2 (MAX)
Compatible Battery Types: IMR/Li-ion/LiFePO410440, 14500, 14650, 16500, 16340(RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700
Compatible Battery Types: Ni-MH/Ni-CdAA, AAA, AAAA, C, D
Maximum Brightness---- --
Average Rating: 5 of 5 Total Reviews: 7 Write a review »

  0 of 0 people found the following review helpful:
April 22, 2019
Reviewer: Wajahat khan from GIG HARBOR, WA United States  
Excellent service!!!!

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  0 of 0 people found the following review helpful:
Badass charger March 3, 2019
Reviewer: Carlos from Baytown, Tx  
Thank you so much for this charger it charges all the batteries I own from 27100 to 18650 and 18350 and AA AAA and it rapid charges which is a badass this g I couldn't do before with other charges than for the product :)

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  0 of 0 people found the following review helpful:
February 16, 2019
Reviewer: Jon M Zacharias from Lakemoor, IL United States  

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  0 of 0 people found the following review helpful:
Handy Charger December 22, 2018
Reviewer: eGFGearHea from Brookline, MA United States  
I bought the 2-slot UMS2 Intelligent USB battery charger and its smaller size (compared to the 4-slot UMS4) makes it very easy to carry while traveling.  It gives equal performance to the larger charger, so the UMS4 stays at home while the UMS2 goes on the road.  Perfect!

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  1 of 1 people found the following review helpful:
Superior Customer Service December 3, 2018
Reviewer: Kkenneth Bruno from BrBighton, MA United States  
First and foremost I would like to thank the Nitecore store for their incredible customer service.  I received a charger that was not functioning properly and I immediately contacted them about an exchange.  In less than an hour I received a message with an apology and a promise that they would personally inspect the replacement before sending it out.  There was also a tracking number for the replacement.....no hassles about returning the defective charger, no repackaging and paying for return shipping....nothing of the sort.  They just sent a replacement without hassle or delay.  Finally, a company that gives a damn about the customer and their reputation.
The charger is great...charges up my 21700 batteries efficiently.  The 21700's fit really well and are easy to get in and out of the slots.  If you have batteries longer than 72mm they will easily fit.
Nitecore is top notch all around!

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