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NITECORE UMS4 USB Four-Slot USB Fast Charger, for 18650, 21700 Batteries
NITECORE UMS4 Intelligent USB Four-Slot Superb Battery Charger

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Price: $38.95

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

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2x Nitecore IMR3100-35A [Add $33.80]
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  • 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
  • micro USB charging cable

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: 26 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Great battery charger November 9, 2020
Reviewer: vaCsanady from ParkeDr, CO Uniteeecddd States  
This charger is replacing an older NITECORE charger that I owned. I thought the older model was great but this one is even slicker. Provides even more status while the batteries are charing. I love the fact that it has a USB instead of a typical AC power cord which makes it simple to use with either an AC outlet (using the proper adapter) or a battery bank. Would definitely purchase again!

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  0 of 0 people found the following review helpful:
5 of 5 Great Service November 7, 2020
Reviewer: Gerald McKee from Hillsboro, OR United States  
You folks always delivwer on time with great trusted product!

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  0 of 0 people found the following review helpful:
5 of 5 SUPER Chargers! November 7, 2020
Reviewer: R. K. Allison from COFFEYVILLE, KS United States  
A bit of history.....I already own (3) Digicharger D4 4 Channel Smart Battery Chargers and I have been charging Nitecore 18650 and RCR 123A in them for several months with NO problems.  I recently purchased lights using 21700 batteries and wanted a multi-charger capable of charging more than one at a time.  After charging several 21700's, this UMS4 seems to be every bit as solid and reliable as the D4's. BOTH models of chargers rate extremely high IMHO.

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  1 of 1 people found the following review helpful:
4 of 5 Great versatile charger September 5, 2020
Reviewer: BJSmith from MariAcopa, AZ United States  
I was excited to get this charger and try it out on some of my batteries that I had been having trouble charging with some of my other older chargers that seemed to be giving me unwarranted errors.  I had some older Powerex batteries that I used another brand charger and kept getting errors messages but as soon as I put them on UMS4 they went thru the testing and started charging without problem  The UMS4 did say that the batteries were in poor condition but it still charged them all and now I know not to expect much more life out of them.  The reason I didn’t give 5 stars is because some of my Ultrafire Lithium 14500 batteries need to be raised up in the battery slots to make good connection to the metal posts for charging but once I figured that out all was good and they proceeded to charge.

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  0 of 0 people found the following review helpful:
4 of 5 August 19, 2020
Reviewer: Christopher Dalbey from Howard Beach, NY United States  

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