Product information

Overview
The NITECORE UI1 charger is a compact single-slot USB-C charger designed to quickly and safely recharge your Li-ion/IMR batteries, including long formats like 20700 or 21700. With a max current of 0.8–1 A, it ensures efficient charging without overheating, while remaining ultra-portable (only 40 g).

⚙️ Main technical features
  • Power supply: USB-C 5 V/1 A (5 W)
  • Charging current: up to 800 mA, with Low-Current mode (100 mA) under 2.9 V to preserve deeply discharged cells 
  • Output voltage: 4.20 V ± 1 %
  • Compatibility: Li-ion/IMR batteries from 10340 to 26650, including large formats 20700/21700 
  • Built-in protections: reverse polarity, short circuit, overheating, overcharge – automatic stop at end of charge
  • LED indicators: 3 LEDs provide real-time charge status 
  • Dimensions and weight: 122.5 × 29.2 × 32 mm, 40.5 g 

🌍 Usage and ergonomics
The UI1 is ultra reliable and intuitive: just slide in the battery, connect a USB-C power source (adapter, power bank, SOLAR...), and charging starts automatically. Practical and compact, it fits in your pocket or bag, ideal for travel.

✅ Key advantages
  • Ultra-portable: lightweight, discreet, and easy to store design 
  • Wide compatibility: supports almost all 3.7 V Li-ion batteries on the market
  • Complete safety: multipoint protection, ideal for stress-free use 
  • Smart charging: current automatically adjusts according to the battery's condition to preserve its lifespan
  • Intuitive LEDs: 3 charge levels simplify monitoring

📌 Why choose it?
The NITECORE UI1 is ideal if you are looking for a reliable mini charger, perfect for travel or discreet daily use. It offers safe and fast charging of 18650, 21700, or other batteries, all in a truly compact format.
Tech Specs
Manufacturing country
RPC
What’s in the Box
Content
Chargeur UI1
Câble USB-C vers USB-A
Documentation utilisateur
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Wiktor Slask
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darek rak
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