Home > Products > Batteries > Chargers >

NITECORE UMS4 Intelligent USB Four Slot Superb Battery Charger for AA AAA 14500 16340 18650 21700 20700 batteries and more
NITECORE UMS4 Intelligent USB Four-Slot Superb Battery Charger

Alternative Views:

Price: $38.95

Availability: Usually Ships in 24 Hours
Product Code: CHG-NITE-UMS4

Add a Battery and Save*:
No Battery Added
2x Nitecore IMR3100-35A [Add $33.80]
4x Nitecore IMR3100-35A [Add $67.60]

Charging Adapter:
No, Thanks! (Default)
Add a Quick Charge 3.0 USB AC Power Adapter [Add $9.99]



  • Capable of charing 4 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 USM4 Charger

Quick and Efficient Charging

Introducing the NITECORE UMS4 Intelligent USB dual-slot charger designed to recharge your batteries fast, safe and efficiently. The UMS4 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 UMS4 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 UMS4’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 UMS4 supports various battery types (li-ion/imr/lifep04/ni-cd/ni-mh) and common battery sizes including (18650, 16340,14500).


Input DC 5V/2A 12V/1.5A / 18W(MAX)
Output 4.35V±1% / 4.2V±1% / 3.7V±1% / 1.48V±1%
Output Current QC Mode 3,000mA*1 (MAX) 2,000mA*2 (MAX) 1,000mA*4 (MAX)
Output Current Standard Mode 2,000mA*1 (MAX) 1,000mA*2 (MAX) 500mA*4 (MAX)
Compatible Battery Types: IMR/Li-ion/LiFePO4 10440, 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-Cd AA, AAA, AAAA, C, D
Dimensions L-6.26"xW-4.21"xH-1.61"
Weight 9.01oz
Average Rating: Average Rating: 4.5 of 5 4.5 of 5 Total Reviews: 5 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Not sure what more you could ask for in a charger. 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.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
5 of 5 UMS4 Charger March 7, 2019
Reviewer: Joe IckesJOe from Okeana, OH United States  
This charger is Great provides all information about batteries and charge status.
Used on my USB rechargeable streamlight battery and it finally gave the battery a full charge. The built in charger on the flash light does ok, but this nitecore is what is needed.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
5 of 5 Impressive charger January 23, 2019
Reviewer: Jim Braun from Cincinnati, OH United States  
I also purchased a power adapter that allows me to take advantage of the Quick Charge capability which worked quite well.  I really like the functionality of the charger and the display is sharp and clear.  Best one I have ever used.

Was this review helpful to you?

  1 of 1 people found the following review helpful:
3 of 5 NITECORE UMS4 Intelligent USB Four Slot Superb Bat December 14, 2018
Reviewer: Mike Busby from Pocatello, ID United States  
Customer service is excellent, however charger has some issues such as thermal control. Battery I was charging got so hot it boiled paper wrap on battery (Eneloop aaa), I would think that charger would have thermal control and scale back current to avoid possible explosion or fire. Also rear slider contacts need to have contact bumps extend to bottom so triple aaa battery will fit better and one last issue is AA and AAAs default amperage shoud be around 0.3amps and ramp up from there to maybe 0.5 Max.The good news though its USB powered thats awesome plus 2.0a charging from USB.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
5 of 5 Perfect Charger, Super Fast November 26, 2018
Reviewer: Samantha Hack from Texas, US  
I use this charger with a the same PD 3.0 USB wall plug i use to charge my laptop, and it charges just as well as QC 2.0/3.0. Two batteries pull 2A without a problem for super fast charging.

The display is easy to read, the controls are easy to navigate, and it provides more information that a lot of other chargers in the market.

Also, the charger does not make the high pitched electric whining noises that I am so sensitive to - an indicator of high quality.

All in all, this charger meets the high standards I expect in my devices. Will buy Nitecore again.

Was this review helpful to you?