Description
Nitecore UI1 – Single-Slot Portable USB Li-ion Battery Charger
Powerful and compact, the Nitecore UI1 is a single-slot portable USB lithium-ion battery charger that reaches a maximum charging current of 800mA and accepts 18650, 18350, 20700, 21700 and dozens of other Li-ion and IMR cell sizes. At 1.43 oz and 4.82" long, the Nitecore UI1 fits in the palm of your hand and travels easily in a pack or glovebox.
Its USB input works with wall adapters, power banks, solar panels and car chargers, which makes the Nitecore UI1 a practical field charger for camping, overlanding and emergency kits as well as a compact desk charger for everyday 18650 flashlight use.
Key Features
- Single-slot portable USB Li-ion battery charger
- Maximum charging current of 800mA
- Intelligent charging mode selection (constant current and constant voltage)
- Power indicator shows real-time battery level and charging status
- Safeguards against reverse polarity, overcharging and overheating
- Charges large-format cells including 20700 and 21700
- Lightweight and portable for outdoor charging
Specifications
| Model | Nitecore UI1 |
| Slots | 1 |
| Input | DC 5V/1A 5W (USB) |
| Output Voltage | 4.2V ±1% |
| Output Current | 800mA (max) |
| Compatible With | Li-ion / IMR: 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14430, 14500, 14650, 16340 (RCR123), 16500, 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 22500, 22650, 25500, 26500, 26650 |
| Dimensions | L-4.82" x W-1.15" x H-1.26" |
| Weight | 1.43 oz |
| In the Box | 1 x Nitecore UI1 charger |
Frequently Asked Questions
What batteries does the Nitecore UI1 charge?
The Nitecore UI1 charges rechargeable Li-ion and IMR cells including 18650, 21700, 20700, 18350, 16340 (RCR123), 14500, 26650 and more than two dozen other sizes. It is a Li-ion charger only — do not use the Nitecore UI1 with NiMH or alkaline batteries.
How fast does the Nitecore UI1 charge?
The Nitecore UI1 delivers up to 800mA of charging current at 4.2V ±1%. On a 3400mAh 18650 that works out to roughly four to five hours from empty, and the charger automatically switches between constant-current and constant-voltage modes as the cell fills.
Is the Nitecore UI1 safe to leave charging?
Yes. The Nitecore UI1 includes protection against reverse polarity, overcharging and overheating, and terminates the charge automatically when the cell is full. As with any lithium charger, use it on a hard non-flammable surface.
How do you know when the Nitecore UI1 is finished?
A power indicator on the Nitecore UI1 shows the real-time battery level and charging status, so you can see at a glance how far along the charge is and when it has completed.
Can you power the Nitecore UI1 from a power bank or solar panel?
Yes. The Nitecore UI1 draws DC 5V/1A over USB, so it runs from a power bank, solar panel, car adapter, laptop port or standard wall adapter — which is what makes the Nitecore UI1 useful for camping, travel and emergency kits.
How big is the Nitecore UI1?
The Nitecore UI1 measures L-4.82" x W-1.15" x H-1.26" and weighs 1.43 oz, so it fits comfortably in the palm of your hand and adds almost nothing to a pack.
Where can I buy the Nitecore UI1?
You can buy the Nitecore UI1 single-slot USB Li-ion battery charger here at Going Gear, an authorized Nitecore dealer, so you receive genuine Nitecore stock backed by the manufacturer's warranty.