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UltraFire U18 - 3400 3400mAh USB Rechargeable 18650 Li-ion Battery
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UltraFire U18 - 3400 3400mAh USB Rechargeable 18650 Li-ion Battery

- Red with Black

4.92 39 Customer Reviews | Please refer to English description
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    COD This product supports COD on delivery. Suggestions: Do not place orders with non-COD products, otherwise you will not be able to choose COD payment method.
    Ship between: Sep 07 - Sep 09, Estimated Shipping Time: business days Order Processing Time may require a few days. Once dispatched from warehouse, Shipping (or Delivery) Time depends on the Shipping Method.
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UltraFire U18 - 3400 Descriptions

Main Features:
● 18650 Li-ion battery with Micro USB charging port
● 3400mAh 12.6Wh high capacity, designed for high drain devices
● Reverse polarity / over-charge / over-discharge protection
● 500 charge-discharge cycle times

Rated charging voltage: 3.7V
Constant charging voltage: 4.2V
Max charging voltage: 4.30V + / - 0.05V
Constant charging current: 800mA
Max charging current: 1000mA
Cut-off current: 50mA
Dis-charging current: 5 - 6.3A

Caution: USB cable not included



Brand: Ultrafire
Type: Battery
Battery Type: Lithium-ion
Rechargeable: Yes
Protected: No
Capacity (mAh): 3400mAh
Voltage(V): 3.7V
Charge Current: 800mA
Max. Charge Voltage: 4.30 + / - 0.05V
Max. Charge Current: 1000mA
Discharge Current: 5-6.3A
Discharge Time (h): 8-10h
Over-charging Protection: Yes
Over-discharging Protection: Yes

Dimensions and Weight

Product weight: 0.0480 kg
Package weight: 0.0800 kg
Product size (L x W x H): 7.00 x 1.80 x 1.80 cm / 2.76 x 0.71 x 0.71 inches
Package size (L x W x H): 13.50 x 7.50 x 2.80 cm / 5.31 x 2.95 x 1.1 inches

Package Contents

Package Contents: 1 x UltraFire U18-3400 18650 Li-ion Battery
UltraFire U18 - 3400 18650 3400mAh USB Rechargeable Li-ion Battery - Red with Black
UltraFire U18 - 3400 18650 3400mAh USB Rechargeable Li-ion Battery - Red with Black
UltraFire U18 - 3400 18650 3400mAh USB Rechargeable Li-ion Battery - Red with Black
UltraFire U18 - 3400 18650 3400mAh USB Rechargeable Li-ion Battery - Red with Black
UltraFire U18 - 3400 18650 3400mAh USB Rechargeable Li-ion Battery - Red with Black

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Customer Reviews

4.92 out of 5
  • 36
  • 3
  • 0
  • 0
  • 0
See all 39 reviews Write a Review
  • Blaise
    Yes (0) Color: Red with Black
    USB rechargable Li-ion battery
    High capacity Li-ion battery which do not require dedicated charger. Simple use a phone charger or any similar which provide 5V USB power and connect it to the micro USB slot on the battery.
    Charging time depends on the supplied charging current.
    This battery can be charged by normal Li-ion battery chargers as well.
    The capacity is really amazing.

    Jul 02,2019

  • UltraFire U18
    Yes (0) Color: Red with Black
    Pretty damn good
    These batteries are pretty popular with the vape culture and I’d have to say that these are pretty good because of the pricing and easy access. The batteries tend to get pretty warm during charging but that’s the only issue I’ve noticed. The batteries don’t drain super fast and to your gain they charge pretty quick too!
    - no cons

    Feb 15,2018

  • Nashgaar
    Yes (0) Color: Red with Black
    Ultrafire 18650
    Very useful, that USB connector is a great and very usable idea. Strong battery. Came very well packaged.
    Nothing at all.

    Feb 23,2018

  • Nunz
    Yes (0) Color: Red with Black
    Happy with it
    The ability to charge it without needing a charger is fantastic.
    It claims to use Panasonic cells.
    I'm happy with it, I use it on a Convoy flashlight and it performs perfect
    I have no cons to this product, I have used it for a long time now and can't find any problem

    Jun 23,2018

  • Martin
    Yes (0) Color: Red with Black
    18650er Akku mit USB-Anschluß
    Versandzeit war absolut im Rahmen.
    Artikel entspricht der Beschreibung.
    Benutze die Akkus in einer BLF A6 und einer Convoy S2+ 365nm Nichia UV.
    Dort passen sie rein. Etwas knapp, aber es geht.
    Für mich eine gute Lösung um auf Reisen kein Ladegerät mit nehmen zu müssen.
    Nothing so far.

    Feb 05,2017

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There are two key factors which will affect the time you receive your items.

Item processing time
After receiving your order,we require some time to test the product to ensure its quality.The exact processing time varies depending on the item.The average processing time is 3 working days.but this can also be affected by the item's stock status. For small quantity orders,the processing time is 1-3days while larger quantity orders may require 2-5days.
Shipping methods
China Warehouse:
Shipping Type Country or Region Arrive within 1-7 Days Arrive within 8-15 Days Arrive within 16-30 Days Arrive within 31-45 Days Average Time (Days)
Unregistered Air Mail or Registered Air Mail United States 0.52% 23.78% 69.62% 5.87% 25.63
Spain, United Kingdom, Italy, Germany, France & Portugal 1.58% 35.8% 56.84% 5.57% 26.39
Netherlands, Greece, Poland, Hungary, Slovakia, Czech Republic 5.59% 24.44% 55.84% 13.00% 27
Russia 0% 0.04% 64.94% 30.02% 39.53
Japan, Korea 0% 21.30% 68.80% 9.66% 23
Brazil 0% 0% 23.91% 72.09% 38.6
Thailand, Singapore & Malaysia 0% 18.38% 54.27% 25.34% 19.03
Other countries 0.7% 38.79% 47.94% 8.56% 23.57
Priority Line United States 0.43% 33.18% 65.07% 0.5% 16.43
Spain, United Kingdom, Italy, Germany, France & Portugal 2.55% 18.21% 35.65% 34.27% 26.31
Russia 0% 0% 32.6% 65.4% 36.07
Australia 7.67% 86.60% 5.68% 0% 11
Korea 35.54% 44.45% 19.32% 0% 11.65
Japan 95.80% 2.09% 0% 0% 6.84
Thailand, Singapore & Malaysia 58.96% 41.04% 0% 0% 8.45
Other countries 22.33% 30.8% 27.62% 17.64% 18.65
Expedited Shipping ALL countries(EMS) 3.8% 46.8% 26% 15% 14.8
ALL countries(DHL) 65.8% 25.75% 3.86% 0.37% 6.72
GW Warehouse: Typically 3-5 days to the UK, 3-7days to other European countries.
USA Warehouse:Generally, 3-7 days to a USA address.
ES Warehouse:Generally, 2-5 days to the Spain ,3-7 days to the Portugal.
Shipping from warehouse nearest to shipping address is faster. Additional charges may apply.
Note:This is a general guide and delays maybe caused force majeure, natural disasters, inclement weather, war, public holidays, and factors outside our control.

Payment accepts PayPal,Credit Cards,Wire Transfer and Westem Union as secure payment methods.

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For orders which exceed $1,500,please contact us at
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Western Union
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Note: please email us the following information after you have paid via Westem Union:
· Control Number(10 digits)
· The exact amount sent along with the currency
· Name of sender.
· Address of sender

Do you want to bulk buy UltraFire U18 - 3400 ? Please submit your wholesale UltraFire U18 - 3400 inquiry below. Please note we usually don’t offer free shipping on wholesale UltraFire U18 - 3400 orders, but the wholesale price will be a big bargain.

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