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Fitorch UC34R 18650 3400mAh 3.7V Protected Lithium Ion (Li-ion) Button Top Battery

uc34r battery at an angle
uc34r vertical micro usb port showing
manufacturer slide about main features
uc34r micro usb charging
uc34r battery specifications
uc34r battery at an angle
uc34r vertical micro usb port showing
manufacturer slide about main features
uc34r micro usb charging
uc34r battery specifications
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Fitorch UC34R 18650 Protected Li-ion Battery with Built-in Micro-USB Port

3.7V 3400mAh 12.24Wh

The new Fitorch UC34R 18650 is one of Fitorch's newest batteries that has the unique feature of being capable of direct recharge with any standard micro USB cable. Charge your battery anywhere easily without having to buy a separate charger. The built-in micro USB charge port is located at the positive end of the battery with the LED charge indicators directly above that. These indicators allow for real-time monitoring of your charging process so you don't have to wonder if the battery is done charging. The 3400mAh capacity allows for long run times and extended use, ideal for specialty electronics and high performance flashlights. The lithium ion chemistry provides safe energy storage that is capable of being recharged up to 500 times as well as a stable shelf life of up to 3 years. Safeguarded with a built-in PCB (Protection Circuit Board), this battery is protected from short circuiting, over charging and over discharging.

If you choose to not use the direct recharging or do not have access to a micro USB cable, the UC34R can also be charged with a compatible Li-ion charger. We offer a variety of smart chargers with different features and channels. Browse our selection of Li-ion smart chargers here!


  • Built-in Micro USB charge port for easy charging
  • LED charging status indicators on positive end for real-time monitoring
  • High capacity of 3400mAh
  • Rechargeable hundreds of times over
  • 3.7V of reliable Li-ion power
  • Built-in PCB for multiple safeguards
  • Perfect for specialty electronics and flashlights

Technical Specifications:

  • Battery Size: 18650
  • Battery Chemistry: Lithium Ion (Li-ion)
  • Terminal Type: Button Top
  • Rechargeable: Yes
  • Protected Cell: Yes
  • Protection: PCB
  • Built-in Charge Port: Yes - with Charge Status Indicators
  • USB Port Input Current: 680mA
  • Nominal Voltage: 3.7V
  • Nominal Capacity: 3400mAh, 12.24Wh
  • Max Charging Current: 2A
  • Recommended Charging Current: 1A
  • Peak Voltage: 4.2V
  • Cut-off Discharge Voltage: 2.8V
  • Estimated Charge Cycles: 500 cycles
  • Shelf Life: 3 Years
  • Product Certifications: CE, RoHS

  • Dimensions:

    • Height: 2.74" (69.5mm)
    • Diameter: 0.73" (18.6mm)
    • Weight: 1.69oz. (48g)
    Battery Size:18650
    Battery Capacity (mAh):3400
    Battery Chemistry:Li-Ion
    Battery Voltage:3.7
    Battery Terminal Type:Button Top
    Battery Shelf Life:3 Years
    Product Certifications:CE, RoHS
    Packaging:Retail Packaging
    Warranty:Battery Junction 30-Day Warranty
    Return Policy:Battery Junction Return Policy
    Product Weight:1.69oz
    Country of Origin:China
    4 Reviews
    75% (3)
    25% (1)
    0% (0)
    0% (0)
    0% (0)
    By Emmett
    Excellent price for 3400mAh; holds charge; compatible
    August 17, 2022
    Currently upgrading lower mAh 18650s and these fit all the lights I've put them in, take a charge, and have significantly increased runtimes. A+
    By John
    Fredericksburg, VA
    Great Fitorch 18650's
    July 4, 2022
    I bought two of these & so far good after 6+ months. They have the sweet feature of having a micro USB port on the battery for quick & easy charging. Hold their charge, correct capacity rating, no fitment issues, & a affordable price. Recommend!

    By Landon
    Hurricane, UT
    Good option for Micro USB rechargeable
    August 28, 2021
    The internal resistance of the 2 that I received was a little high for new batteries at 40 and 50 mOhms, and they don't have the charging state lights on the positive end like the pictures show. I tested their capacity on an Xtar VC4s at 3150mAh which is okay since this charger seems to rate batteries a bit lower than their rating in general. Functionally they are perfectly good batteries for "standard" drain applications that don't need more than 10 watts. I bought them to use at work in a Nicron N9 and a Convoy S2+ and they've done well so far.
    By TC
    So. Cal.
    Good battery so far
    December 7, 2019
    Iíve only had this battery for a week and am using it in a Sunwayman C41CT. So far, so good. Itís nice to be able to plug the battery into a USB power source or put it into an external charger. The battery has a red indicator light at the top that changes to green when the battery is charged. The battery measures 69.9mm long.

    I am happy with the purchase.
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