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.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Nitecore NITECORE UMS2 Intelligent USB Dual-Slot Superb Battery Charger and LumenTac Battery Organizer

Product ID: 393314987

Details

Brand
Nitecore
Colour
Black
Item Weight
5.56 Ounces
Output Voltage
4.2 Volts 5
Product Dimensions
7.3D x 15.2W x

⚡4000mA max dual-slot fast charge

📊Real-time LCD battery health & status

🔋Supports 18650 & multiple battery types

¥18810

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

Description

🔌 Power up smarter, faster, and safer — never run out of juice again!

SMART SAFE CHARGING 🔒 - Intelligent tech auto-adjusts current and voltage to maximize battery lifespan and safety.
TURBOCHARGE YOUR POWER ⚡ - Delivers up to 4000mA total output for lightning-fast dual battery charging with QC2.0+ compatibility.
STAY INFORMED INSTANTLY 📊 - Bright LCD screen provides live updates on battery health, charge status, and mode for total control.
TRAVEL READY ORGANIZATION 🎒 - Includes a sleek LumenTac battery organizer to keep your power essentials neat and ready on the go.
UNIVERSAL BATTERY COMPATIBILITY 🔋 - Works seamlessly with Li-ion, IMR, LiFePO4, Ni-MH, Ni-Cd batteries in popular sizes including 18650, AA, AAA.

The NITECORE UMS2 is a compact, intelligent dual-slot USB battery charger delivering up to 4000mA total output with Quick Charge support. Featuring a clear LCD display, it provides real-time battery health and charging status. Compatible with a wide range of battery chemistries and sizes, it automatically optimizes charging current and voltage to protect and extend battery life. The included LumenTac organizer makes it perfect for professionals and travelers who demand efficient, reliable power management.

Specifications

ASIN	B07JN49XYM
Amperage	3000 Amps
Brand Name	Nitecore
Colour	Black
Connector Type Used on Cable	usb
Current Rating	2 Amps
Customer Reviews	4.4 4.4 out of 5 stars (815)
Input Voltage	5 Volts
Item Dimensions D x W x H	7.3D x 15.2W x 4H Centimeters
Item Weight Unit of Measure	5.56 Ounces
Manufacturer	oem
Manufacturer Part Number	UMS2+ORG
Model Number	UMS2
Number of Items	1
Number of Packs	1
Number of Ports	2
Output Voltage	4.2 Volts, 5 Volts

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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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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

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Customer service was outstanding when I had questions about the product.

2 days ago

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¥18810

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

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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