The Nitecore UMS2 is an advanced dual-slot USB-C charger that combines intelligent charging capabilities with high-speed performance in a compact and user-friendly design. Engineered to support a wide range of battery types and sizes, the UMS2 is a versatile tool for users who need a fast, reliable, and safe charging solution for their rechargeable batteries. Whether you are powering up batteries for flashlights, photography gear, or everyday electronics, the UMS2 provides a level of efficiency and control that makes it stand out among modern chargers. Designed for convenience and portability, it uses a USB-C input, enabling compatibility with a broad range of modern power sources, including wall adapters, power banks, car chargers, and solar panels.

With a maximum total output of 4000mA when connected to a USB power adapter supporting 2A output, the UMS2 is capable of charging two batteries at a time with impressive speed. When connected to a Quick Charge (QC) power source, the display confirms the "Quick Charge" status, and the charger can deliver up to 3000mA in a single slot. This allows high-capacity cells, such as 21700 or 26650 batteries, to be charged more quickly, reducing downtime and improving workflow for users who depend on battery-powered devices. In standard mode, the UMS2 can provide up to 2000mA to one slot or 1000mA to each of the two slots simultaneously, offering optimal charging rates based on the power source and battery specifications.

One of the most distinguishing features of the Nitecore UMS2 is its large, high-contrast LCD screen, which displays real-time charging data in a clear and organized format. This display provides extensive information, including battery voltage, charging current, battery type, charging time, accumulated charge volume, battery health status, cut-off voltage, and the selected charging mode. The real-time feedback not only allows users to monitor the charging process in detail but also helps in diagnosing battery issues or verifying performance. To conserve energy and extend display life, the screen automatically dims after ten minutes of inactivity, offering an eco-friendly and non-intrusive experience.

The charger’s intelligent system automatically detects the battery chemistry and applies the most suitable charging parameters, ensuring both safety and efficiency. For users working with specialized batteries or those who prefer manual control, the UMS2 allows custom adjustment of charging voltage and current, enabling precise battery maintenance or reconditioning when necessary. This functionality is particularly useful when handling delicate or less common chemistries that may require non-standard settings. The UMS2 supports lithium-ion, IMR, LiFePO4, Ni-MH, and Ni-Cd batteries, making it an all-in-one charging station for users with a wide range of rechargeable cells.

Its compatibility covers an extensive list of battery sizes, including popular formats like 18650, 21700, 14500, 16340 (RCR123), and 26650, as well as smaller and larger options from 10440 to 26700. For nickel-based batteries, the UMS2 supports standard household sizes such as AA, AAA, AAAA, C, and D, which makes it ideal for recharging both professional equipment and everyday consumer electronics. This broad compatibility means that users only need one charger for all their devices, reducing clutter and simplifying the management of rechargeable power sources.

Safety is central to the design of the Nitecore UMS2, which includes automatic termination of charging when full capacity is reached, along with multiple layers of protection such as overcharge, short-circuit, and reverse polarity safeguards. The constant current and constant voltage charging method used by the device ensures a stable and consistent charge, minimizing the risk of overheating or battery damage and promoting long-term battery health. Combined with the durable build quality and passive heat dissipation design, these safety measures make the UMS2 a dependable choice for both casual users and professionals.

Physically, the UMS2 is compact and lightweight, measuring just under six inches in length and weighing a little over five and a half ounces. Despite its small size, it feels sturdy and well-constructed, with clearly labeled controls and intuitive navigation. The overall layout is streamlined for convenience, ensuring that users can easily insert and remove batteries without obstruction, and the user interface is designed to be as informative as it is simple to operate.

In summary, the Nitecore UMS2 is a highly efficient, intelligent dual-slot charger that combines rapid USB-C charging with broad compatibility, detailed user control, and real-time data reporting. Whether you need to charge high-capacity lithium-ion cells quickly or safely top off nickel-based household batteries, the UMS2 delivers performance, versatility, and reliability in one compact package. Its blend of speed, safety, and smart functionality makes it a top choice for anyone who values dependable power management and advanced battery care.

Input: DC 5V/2A 9V/2A/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)
Output CurrentStandard Mode: 2,000mA*1 (MAX) 1,000mA*2 (MAX)
Compatible BatteryTypes-IMR/Li-ion/LiFePO4:
10440, 14500, 14650,16500, 16340(RCR123), 16650,17350, 17500,17650,17670,17700,18350,18490, 1850018650,18700, 20700, 21700,22500, 22650,25500,26500,26650,26700
Compatible BatteryTypes-Ni-MH/Ni-Cd:
AA, AAA, AAAA, C, D
Dimensions: L-5.98"xW-2.87"xH-1.57
Weight: 5.560z

SHIPPING
The final shipping cost and estimated delivery timeframe will be available to you during checkout. Currently, we offer 3 International shipping methods which are steady and easy to track. Priority worldwide shipping, Premium ( Partial countries) and a faster Express shipping. The estimated times stated below are not guaranteed. An international package could experience delays like postal strikes or severe weather or Cov-19 situation. All shipping ways, PO Box address is not acceptable.

For some flashlights, there's a pure battery inside（phone charging）,If We can not ship your packages via USPS or DHL,we'll ship your package in another way.

Note:
When you place an order for just the batteries, for easy shipping, faster and safe delivery, the batteries are placed in the flashlights.

If you don’t receive your order within the estimated time frame provided below and suspect that it might be lost in transit, please contact Flashlightgo Support ( support@flashlightgo.com ) and we can look into the order with the courier. Lost-in-transit requests must be submitted to Flashlightgo Support within 3 months of the date of shipping or before the courier archives the tracking information.

Option 1.
Express by DHL/UPS/Fedex/Aramax/SF etc ( there may be tax need to pay in this way),
The estimated time of delivery is usually 3-7 work days depending on the country. Includes detailed tracking and confirmation of delivery.

Option 2.
Premium ( 6-10days, All tax and Duty Paid),
All tax and duty are prepaid to carrier by Flashlightgo before shipping, so you dont need to pay any tax or duty when you get it.

Option 3.
Priority shipping(1-2 Weeks, average 10 days)
If we marked it is with all tax and duty paid, all tax and duty are prepaid to carrier by Flashlightgo before shipping, so you dont need to pay any tax or duty when you get it.

Learn more,Please click on Here.

To ensure that you get the desirable product, we allow a seven-day product return period. Any product return application outside this period will not be entertained.
All returned product must be unused and the original package should be kept.

Return：
We do not offer return for personal products like socks and hats or food, magazine and fragile or dangerous products The original receipt must be available for application of return.

Discount products：
No product return for discount products

Gifts products：
If the item is marked as a gift when purchased and shipped directly to you, it cannot be exchanged , refunded or warranty.

Exchange：
We only replace items if they are defective or damaged.
Exchange service are offered only to wrong deliveries or product damage not caused by client. If needed, please email to info@flashlightgo.com.

Warranty
How long is the warranty period?
Flashlightgo warrants to the original purchaser that the Product(s) shall be free of any defect in material or workmanship for a period of one year for labor and one year for parts from the date of the original order except the items listed below:
Chargers,Batteries and Other Accessories: 3 months warranty

Should the Product(s) supplied by Flashlightgo prove defective because of improper workmanship or material as reasonably determined by us, Flashlightgo agrees, at its option, to either repair or replace the Product free of charge, excluding any shipping or handling charges.

Learn more,Please click here.