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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

Add a Battery and Save*:
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1x Nitecore IMR3100-35A [Add $16.95]
2x Nitecore IMR3100-35A [Add $33.80]

Charging Adapter:
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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: 10 Write a review »

  0 of 0 people found the following review helpful:
Must have June 3, 2019
Reviewer: Bill from Virginiage , VA United States  
If you have any type of rechargeable battery, this is a must have.

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  0 of 0 people found the following review helpful:
The best 2 bay charger out there PERIOD. May 26, 2019
Reviewer: Matt from Glen Allen, VA United States  
I have more battery chargers than I care to admit.  I use my chargers for everything from AAA to 21700. It's that last one that has always given me problems. Until I came across the UMS series from Nitecore that is, every other charger I have hits a hard stop on the spring loaded battery bay when inserting a 21700 and you basically have to force it down while risking the integrity of the outer wrapping.  This isn't the case with the UMS series.  There's about half an inch of additional play in the spring loaded bay which makes inserting and removing these larger batteries sooo much easier.

Couple that with the clear and informative display and you've got yourself one of the most versitile chargers on the market. Oh and not to mention that it's powered by a USB port means you can take it anywhere and always be ready to charge.

The optional QC3.0 adapter they include isn't a knock off, it's well built and works perfectly.

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  0 of 0 people found the following review helpful:
Great product April 25, 2019
Reviewer: Dark from VA United States  
Fast delivery, accurate description, easy to use and great price.

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  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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