My ums2 keeps going into reboot loop when at times inserting a 18650 battery; tried 2 brands of batteries; multiple usb cables; defective?

Have you tried a more powerful (output) USB adapter? If the issue persists, contact us (the seller) and we will have the issue resolved swiftly.

Will this unit charge a protected 21700 battery? I know it will accept the unprotected battery.

Yes. It can charge both protected and unprotected 21700 battery.

Does this unit have a discharge function?

No, it does not have a discharge function.

Does it test for battery capacity?

No. It does not display the capacity of the battery.

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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UMS2 Dual Slot USB Smart Battery Charger for Li-on/Ni-MH/Ni-Cd/IMR 16340 14500 18650 21700 20700 AA AAA and Other Batteries with Battery Organizer

Product ID: 740204718

Details

Brand
Nitecore
Colour
Black
Item weight
5.56 Ounces
Output voltage
4.35 Volts
Specification met
CE

⚡4000mA max dual-slot fast charge

📊Real-time LCD battery & charge info

🔋Universal Li-ion/NiMH/NiCd compatibility

463.74 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

Description

⚡ Power up smarter, faster, everywhere you go!

SMART SAFE CHARGING 🔒 - Intelligent current and voltage adjustment protects battery life while optimizing charge speed automatically.
TURBOCHARGE YOUR POWER ⚡ - Dual slots deliver up to 4000mA total output for lightning-fast charging with QC2.0+ USB adapters.
FITS ALL YOUR BATTERIES 🔋 - Compatible with a wide range of battery chemistries and sizes from 18650 to AAA, perfect for every device in your arsenal.
STAY INFORMED INSTANTLY 📊 - Bright LCD screen displays battery status, charge mode, and health in real time—never guess your battery’s condition again.
TRAVEL READY ORGANIZATION 🎒 - Includes a sleek LumenTac battery organizer to keep your power essentials neat and ready wherever you go.

The Nitecore UMS2 is a compact, dual-slot smart battery charger delivering up to 4000mA total output with QC fast charging support. Featuring a real-time LCD display, it intelligently adjusts charging current and voltage to maximize battery lifespan. Compatible with a broad spectrum of Li-ion, NiMH, and NiCd batteries including popular sizes like 18650 and AAA, it’s designed for professionals and enthusiasts who demand speed, safety, and versatility. Bonus: comes with a portable battery organizer for on-the-go convenience.

Specifications

ASIN	B07JN49XYM
Amperage	3000 Amps
Best Sellers Rank	#50,211 in Electronics ( See Top 100 in Electronics ) #200 in Household Battery Chargers
Brand	Nitecore
Color	Black
Colour	Black
Connector Type Used on Cable	USB
Current Rating	2 Amps
Customer Reviews	4.4 out of 5 stars 800 Reviews
Input Voltage	5 Volts
Item Dimensions D x W x H	6D x 6W x 4H centimeters
Item Weight	5.56 Ounces
Item weight	5.56 Ounces
Manufacturer	NITECORE
Mfr Part Number	UMS2+ORG
Model Number	UMS2
Number of Ports	2
Output Voltage	4.35 Volts (DC)
Output voltage	4.35 Volts (DC)
Product dimensions	6D x 6W x 4H centimeters
Specification Met	CE
Specification met	CE

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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TrustScore 4.5 | 7,300+ reviews

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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463.74 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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