Nitecore UMS2 2-Slot USB-C Battery Charger
- 2 slots, USB-C powered
- Up to 4000mA total, 3000mA single slot on a 9V QC2.0+ source
- 1000mA per slot on a standard 5V/2A source
- Li-ion, IMR, LiFePO4, Ni-MH, Ni-Cd
- 18650, 21700, 16340, 14500, AA, AAA and more
- LCD shows health, status and mode
- Organizer included
Updated 25 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A smart two bay charger for flashlight and household rechargeables that shows battery health on its display. Fast charging needs a quick charge USB source, and on a basic adapter it charges at a much lower rate.
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ASIN: B07JN49XYMModel: UMS2Category: Battery Chargers
Overview
Flashlight owners and everyday carry fans get a compact two bay charger that runs from a USB power source and handles lithium and nickel cells alike. It selects the right current and voltage itself, and an organizer holds it tidy for travel.
Wide chemistry and size support means one charger covers flashlights, vapes and household AA cells. Top speed depends on a quick charge USB adapter, which the listing does not say is included.
Who it's for
People who carry lithium powered flashlights and also use rechargeable AA and AAA cells. Households charging many cells at a time need a larger charger.
Pros and cons
- Handles lithium and nickel chemistries
- Many cell sizes supported
- LCD shows health and status
- Fast with a quick charge source
- Slow on a standard USB adapter
- Two slots only
- Wall adapter not listed in the box
Performance notes
Charging current is limited by the USB source, so a quick charge adapter allows the highest rates while a basic adapter caps each slot lower. The charger detects chemistry and adjusts voltage, which protects cells. Larger cells take longer to fill at any current.
Specifications
| Brand | Nitecore |
|---|---|
| Model | UMS2 |
| Dimensions & fit | |
| Item Dimensions D X W X H | 2.87 x 5.98 x 1.57 inches |
| Compatible battery sizes | 10440, 14500, 16340, 18650, 20700, 21700, 26650, AA, AAA, AAAA, C, D and more |
| Item weight | 5.56 ounces |
| Capacity & performance | |
| Output Voltage | 4.35 volts |
| Output Current | Up to 4000mA total, 3000mA single slot (9V QC); 1000mA per slot (5V/2A) |
| Power & efficiency | |
| Input Voltage | 5 volts (USB-C, 9V QC2.0+ supported) |
| Battery Cell Type | Li-ion, IMR, LiFePO4, Ni-MH, Ni-Cd |
| Construction & materials | |
| Color | Black |
| Included components | |
| Included Components | Charger, organizer |
| Other details | |
| Number Of Ports | 2 |
| Display | LCD |
Frequently asked questions
What power source does the Nitecore UMS2 need?
A USB source. A 9V QC2.0+ adapter allows up to 4000mA total; a standard 5V/2A adapter gives up to 1000mA per slot.
Can the Nitecore UMS2 charge AA batteries?
Yes, rechargeable Ni-MH and Ni-Cd AA and AAA cells, plus many lithium sizes.
Does the UMS2 charge 21700 cells?
Yes. 21700 is among the supported sizes.
What does the display show?
Battery health, charging status and charging mode.