ULTRAFIRE 18650 4000 mAh RECHARGEABLE BRC Battery BB-151550B

(7 reviews) Write a Review

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 4000mAH capacity. Manufactured by Utrafire, model number FLB-18650-4.0. We offer a 1 Year Warranty with purchase. See this product elsewhere at a lower price? Call or email us; we have a Price Match Guarantee.


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

emergency lighting, portable devices, power tools)

7 Reviews

  • 5
    Different battery

    Posted by Thomas on May 26th 2021

    Battery King told me that the Ultrafire 18650 4000mah battery was out of stock and offered a different battery of the same size and shape. They shopped the new batteries right away and when I got them they were the same physical size, but the mah rating was 5000 vs the original 4000. I got an upgrade and they work great.

  • 5
    custom battery cables

    Posted by bill ganas on Mar 13th 2021

    I am going to brag... I have made 2 great decisions in the last 12 months.... and both involved purchases and Both are Better than Seller advertised... These cables are perfect for my job and my C8 is just outside my door...

  • 5
    Bright Light!

    Posted by Dave G on Oct 30th 2020

    Received these batteries and inserted them into an LED flashlight. They worked right away and helped produce a strong, bright light.

  • 5
    UltraFire Battery

    Posted by Tom on Oct 15th 2020

    Charged them up a little more for optimum performance and they work fantastic........Thank You!

  • 5

    Posted by THOMAS WILSON KREBS on Aug 20th 2020

    Product arrived as ordered. Yet to recharge.

  • 5

    Posted by Bill on Jan 3rd 2020

    Great price and service.

  • 5

    Posted by Kay on Jun 10th 2019

    Works nice in my stun gun