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UI1 Charger

UI1 Charger

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UI1 Charger (1 Slots)

Lightweight and portable 800mA USB Charger that fits larger 21700 batteries.

Safe and Efficient Charging
Designed to charge your batteries safe and efficiently. 800mA maximizes battery recharge cycles so your battery stays healthy over the years.

Works with 21700 batteries
Works for the latest generation of larger 21700 batteries, as well as 18650 sized batteries.

Intelligent USB Charging
Intelligent charging technology automatically detects and applies the appropriate charging current/voltage.

Fire Retardant Materials
Doesn't catch fire, can be used outdoors without any overheating concerns for maximum safety.

How fast does it charge?
Battery Type (Capacity) One at a time
21700 (5000mAh) 6hr 15min
21700 (4000mAh) 5hr
18650 (3500mAh) 4hr 22min
18650 (2600mAh) 3hr 15min
RCR123 (650mAh) 48min

Charging duration uses this formula:
Battery Capacity (mAh) / Charger Output Current (mA) = Hours

What's in the box
  • UI1 USB Charger
  • High Amp USB Charging Cable

Order with Batteries
  • UI1 charger (without batteries) - $19
  • UI1 charger + 1x NL2150 (5000mAh) 21700 battery - $78
  • UI1 charger + 1x NL1835HP (3500mAh) 18650 battery - $68

Input DC 5V/1A 5W
Output 4.2V±1%
Output Current 800mA (MAX)
Dimensions 122.5 x 29.2 x 32mm
Weight 40.5g
Li-ion/IMR: 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14430, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500,17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 22500, 22650, 25500, 26500, 26650
"When you need smallest charger at the cheapest price that works with 21700 batteries, this is my best pick."

by Linda L.

What happens after payment?

  • You will receive a purchase receipt through Paypal after payment.
  • Your order will be processed within the next working day and we will email you a tracking code once your package has been shipped.

When will I receive my lights?

    • Deliveries in Singapore will take up to 4-6 working days by Courier.

Returns and warranty

  • If our lights don't work the way they should, let us know and we'll do our best to get you sorted. 1-year repair warranty.

User manual

We believe in this product so strongly that we're giving you a 60 days money back guarantee! If for whatever reason you are unsatisfied with your purchase, ship the entire package back to us with your Order #number and we'll give you a full refund!
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Customer Reviews

Based on 9 reviews
UI1 Charger

UI1 Charger is just a simple single battery charger. It would be better if incorporated with display as its uniqueness where no other charger ever innovate instead of just with 3 LED.

Ophelia Chong

UI1 Charger

UL1 Charger

charger was awesome but unfortunately the charging port is micro usb instead of usb C would be better if it was standardise to usb c

Tristram Marie Chua Panganiban
multi purpose battery

recently bought a charger and battery, although the HC33 didn’t work for me but I can still use it for my P10 V2

USB convenience

Compact and USB friendly. Not the fastest charger but helps to get some juice into my batteries.


Easy to use. Need to modify to usb c for more convenience

Dave Lin
Nitecore UI1 Battery Charger Short Review

This is one of the rare USB battery charger that can charge protected 21700 battery. It is compact and light so that it can be conveniently carried around. It can charge a wide range of my batteries from 16340 to 26650 and protected 21700 with a charging current of 1000mA. It is simple to use and does not have a lot of controls, good for majority of users who just want to pop in a battery and let the charger do the rest until it is fully charged.

Brandon Lim

UI1 Charger

I have only 1 improvment

I have only 1 improvment to share,I would love to see the charging cable change to type C charging cable

Where's Your Next Adventure? @nitecoresg

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    Techplace II Singapore 569874
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