ULTRAFIRE 18650 4200 mAh RECHARGEABLE Battery BB-151550B

(12 reviews) Write a Review
Minimum Purchase:
2 units

This is a high-performance replacement battery for the ULTRAFIRE 18650 BRC RECHARGEABLE.  The battery is 2.69 x 0.71 x 0.71 inches with an output of 3.7 volts. The chemistry is LI-ION at 4200mAH capacity. Manufactured by Ultrafire, model number FLB-18650-4.0. We offer a 1 Year Warranty with purchase. 


Minimum order quantity 2 Batteries


Compatible with most 18650 based lighting tools(as headlamp ,flashlight ,laser pen,

emergency lighting, portable devices, power tools)



12 Reviews

  • 5
    Good stuff

    Posted by Dean uerling on Sep 13th 2023

    See you again

  • 5
    Rechargeable battery

    Posted by Ferdinand Baez on Mar 9th 2022

    Replacement battery works better than expected

  • 5
    Battery fine...service better

    Posted by Mark Hoesten on Mar 7th 2022

    Hey! They are batteries...they work fine. What is most important is that, the one I wanted was on back order so they actually emailed to ask if an alternative was OK! Heck yes! Thanks

  • 5
    18650 Battery

    Posted by JT on Dec 8th 2021

    Recently I received a battery operated clipper that would not hold a charge and ran way too slow. I turned to Battery Kings for a solution and the 18650 battery they sent is top quality. It is amazing how a good battery can bring new life to a your devices.

  • 5
    18650s should all be this good!

    Posted by Brian Ansorge on Sep 1st 2021

    Needed a little help figuring some things out, but talked to someone personally (always nice) and now my batteries are ROCKING!