Home > Products > Chargers and Accessories >

Nitecore UM20 Digital Smart Charger for 18650 17650 17670 RCR123A 16340 14500 Batteries
Nitecore UM20 Digital Smart Charger for 18650 17650 17670 RCR123A 16340 14500 Batteries

Alternative Views:

Price: $15.99

Availability: Usually Ships in 24 Hours
Product Code: CHG-NITE-UM20

Add a Battery and Save*:
No Battery Added
2x Nitecore 2300mAh 18650 [Add $17.91]
2x Nitecore 3400mAh 18650 [Add $34.11]

Charging Adapter:
No, Thanks! (Default)
Add a USB AC Power Adapter [Add $4.95]
Add a USB Car Power Adapter [Add $4.95]
Add USB AC & Car Power Adapters [Add $7.95]


UM20 is the latest innovation from Nitecore that is a USB powered Li-ion battery charger. It is compact, fully automated with clear digital display of detail charging status and charges many different type Lithium Ion rechargeable batteries.

Note: Authentic Nitecore charger has a validation number on the box. Scratch off the validation sticker to get your validation number.


  • Input voltage: Micro USB DC 5V
  • Output voltage: 4.2V ±1% / 5V
  • Output current: 1000mA / 500mA
  • Compatible with: Li-ion / IMR: 18650, 18490, 18350, 17670, 17500, 16340(RCR123), 14500, 10440
  • Dimensions: 3.94inch x 2.20 inch x 1.38 inch
  • Weight: 2.72oz (without batteries or power cord)


  • High definition LCD displays real time charging status
  • Automatically stop charging when complete
  • Reverse polarity protection
  • Apply the proper charging current and voltage based on the battery type and capacity.
  • USB output port to charge your mobile phones or tablets
  • Prioritize either the battery charger or USB output port based on your selection.
  • Selects charging current based on battery capacity
  • Rear USB cable winder that keeps your charger compact and organized
  • Enables data transfer via USB
  • Optimized charging for IMR batteries
  • Ultra-safe with optimal heat dissipation and fire retardant materials
  • Environmently friendly certified by RoHS, CE, FCC and CEC

Content in package: UM20 Digital charger x1; MicroUSB-USB power cord x1

Average Rating: 3.5 of 5 Total Reviews: 3 Write a review »

  0 of 0 people found the following review helpful:
UM20 June 13, 2018
Reviewer: Ralph Morales from New Mexico, NM United States  
What a fantastic charger ! I wish I had found this charger years ago. It does everything that it promises.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
Bundled Charger & A.C. Adapter NOT Compatible April 21, 2018
Reviewer: GENE WEINMANN from WOODINVILLE, WA United States  
I bought the UM20 charger to accompany a Nitecore flashlight. Unfortunately, I cannot charge the battery for the flashlight because Nightcore shipped the wrong AC adapter. The cord which came with the um 20 was a male USB on one end and a male micro USB on the other. I ordered the AC adapter which they offer bundled with this charger. Unfortunately the AC adapter has a female USB Jack which is not compatible with the micro USB plug in the cord that accompanied the um20, so I have no way to charge the flashlight battery. My options were to contact Nightcore which was closed over the weekend and basically wait for almost a week to receive whatever solution they suggested, or simply purchase the correct cord elsewhere online for immediate delivery, which is what I did.

<You need detach the cable from its storage slot. Plug the Micro USB end to the top of the UM20 charger and the USB end to the charging adapter. --- NitecoreStore Customer Service>

Was this review helpful to you?

  0 of 0 people found the following review helpful:
Charger January 21, 2017
Reviewer: Rebecca Wolkiewicz from Blasdell, NY United States  
Works good. came in about a week after ordered.

Was this review helpful to you?