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Ultrafire 3000mAh Protected Rechargeable Li-Ion Battery - Button Top

Ultrafire 18650 3000mah BUTTON TOP Protected Rechargeable Lithium Battery Li-Ion UF18650-BRC
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Item #:ULTRAFIRE-BRC-18650-3000
Product Review:
Regular Price:$19.95
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 PLEASE NOTE:  Image Shows 2 Batteries. (Batteries Are Sold Individually)

Ultrafire BRC 18650 3000mAh 3.7v Protected Rechargeable Lithium-Ion Battery

Detailed Description:

Protected 18650 3000mAh rechargeable 3.7 volt battery - charge with the Ultrafire Multi-Battery charger.

The advantage of this cell is that it features a button top making it particularly compatible with many flashlight applications.

Rechargeable Lithium batteries are rapidly becoming a very economical way to lower the operating costs of Lithium-Powered flashlights. We offer a number of different options in order to meet any rechargeable needs. These are Protected batteries.

These fully protected cells simplify usage with their integrated PCB. Perfect for your single cell application these cells are not for pack building as doing so will defeat the PCB protection which is matched to the correct voltage on a single cell. If you are building a pack please choose one of our other cells and the appropriate PCB.

Features and Benefits

  • Unique and New! With integrated PCB Protection!
  • Lithium Ion 18650 cylindrical rechargeable batteries
  • Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V.
  • Unique PCB design and patent pending.
  • Higher energy density and lower weight than other types rechargeable batteries
  • Manufactured under ISO9001-2000 to assure quality
  • Battery tested based on International Electrotechnical Commission (IEC) standard to ensure capacity, quality and life time
  • Lighting or other device needing 3.7V power
  • Building portable power device needing high energy density and low weight

Product Specifications

  • Capacity: Nominal&: 3000mAh, Minimum: 2450 mAh
  • Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V.  UNIQUE INTERNAL PCB!
  • Dimensions:
    • Diameter: 18.6+/-0.2 mm *
    • Height: 66.5+/- 0.2mm
  • Weight (Typical) Approx. 46 g
  • Nominal Voltage: Average 3.7V
  • Cut-off Voltage: 2.5V
  • Internal Impedance: less or equal to 180  milli-ohm (with PTC)
  • Cycle Performance: 90% of initial capacity at 400 cycles
  • Cycle life: > 500 cycles
  • Charge: Current = 0.5C (~1500mA) Voltage = 4.2 V End Current = 0.01 mA
  • Discharge: Current = 0.5C (~1500mA) End Voltage = 3.0V

* Note: These higher capacity cells have a larger diameter than standard 18650's and may not fit all flashlights. Please verify dimension of flashlight or device. Not compatible with Fenix T-Series flashlights.

WARNING: Use caution when working with Li-ion cells, they are very sensitive to charging characteristics and may explode or burn if mishandled. Make sure the user has enough knowledge of Li-Ion rechargeable batteries in charging, discharging and assembly before use. Always charge in/on a fire-proof surface. Never leave charging batteries unattended. We are not responsible for damage if there is any modification of the batteries/chargers in any form or shape (including pack making). We are not responsible for any damage caused by misuse or mishandling of Li-Ion batteries and chargers. We only recommend using Lithium Ion rechargeable batteries with a control circuit (protection PCB) to assure safe charge, discharge, etc, use of lithium ion batteries without a protection circuit is potentially hazardous

More Information:

Ultrafire 18650 3000mAh button top protected rechargeable lithium ion batteries are ideal for use in flashlights because of the button top design. These batteries will also provide many more life cycles than traditional alkaline batteries. Since these are PCB protected batteries, they are best used in single cell applications. If you attempt to use these cells in pack building, the built-in protections are nullified because they have been designed to match the correct voltage of a single cell, which in this case is 3.7V. Note that the image accompanying these batteries shows two cells; the batteries are sold individually.

Battery Size:18650
Battery Capacity:3000mAh
Battery Chemistry:Li-Ion Rechargeable
Battery Voltage:3.7V
Battery Terminal Type:Button Top
Battery Shelf Life:3 Years
Warranty:Battery Junction 30-Day Warranty
Return Policy:Battery Junction Return Policy
Country of Origin:CN
Ultrafire 18650 3000mah BUTTON TOP Protected Rechargeable Lithium Battery Li-Ion UF18650-BRC
3.5 Stars based on 15 Review(s)
New England
2 Stars

In the recycling bin
December 30, 2014
I bought four of these cells during the black Friday promotional time period around Thanksgiving along with Nitecore D2 charger. I began using them in my lights and noticed the lights quit much sooner than they do when I run them on the Titanium Innovations CR123A batteries sold by Battery Junction for $1.00 each. This prompted me to do a somewhat scientific test. I began by charging the batteries fully. The D2 indicates the fully charged voltage and I verified this with a multi meter. Next I switch on NFL pregame, installed one of the four batteries and set my light on medium. According to the light's specification, the light will run 3 hours at a steady 250 lumens. The light quit after 26 minutes. Long before I finished watching the play off bound Patriots lose what turned out to be pre-season game against Buffalo, I had tested all four batteries and all four powered the light for 26 minutes or less. I had to do a post-Christmas run to the town dump and recycling center so I took that opportunity to drop off the four in the battery recycling area. $35 wasted. On a side note, the Nitcore D2 seems to work well so far. Now I just need to find some batteries worthy of keeping.
The outer skin is peeling off

Timonium, MD
4 Stars
I would recommend this item to a friend.

Great price
December 29, 2014
So far they seem to be holding up well

sac town
5 Stars
I would recommend this item to a friend.

powerfull batteries
December 27, 2014
Charged great, super bright light now. thanks BJ
full charged power house
what u kidding me they work great

2 Stars

They don't last
December 25, 2014
These are in no way 3000mah capacity. They run less than an hour of total, intermittent, run time in my Olight M22 before needed to be recharged.
No capacity

3 Stars

Make sure batteries are good.
December 21, 2014
I purchased 2 of these batteries. I ran one on high at 600 lumens for 3 hours straight. It held up really well. The other battery i received is a dud. I have attempted to charge it in my nitecore i2 charger and nothing happens no lights light up. The charger is good because the good battery works in both battery charging bays. The bad battery does nothing. The bad battery wouldn't be worth returning when including shipping costs.
Works good if you receive good batteries

morganton, NC
4 Stars
I would recommend this item to a friend.

November 18, 2014
Powerful batteries that cause my Fenix flashlight to stream a bright white light and makes the dark go away. They charge easily and hold a charge better than average, but are still a little pricey.

Bradley david
5 Stars
I would recommend this item to a friend.

Never runs out!
May 20, 2014
Love this battery!
Holds a charge for a long time.

4 Stars

Decent batteries
May 19, 2014
These have worked well but the wrapping eventually started to break down exposing pcb.
Decent power, price
Not true 3000mah, brittle wrapped pcb

James L.
1 Stars

Poor reliability
January 9, 2014
Got 4, they worked fine at first, but all 4 have failed in a 2 year period.

4 Stars

Very Good
December 17, 2013
I just got these batteries & Charged them yesterday and and started my testing today, using my \"Innova\" tester that puts a load on, when testing, Reading before test was 4.08V.. Put my \"Nitecore\" SRT6 930 Lumen on turbo for 19 minutes, then tested the voltage again, with a reading of 3.93V.. I feel these will hold up pretty good..Battery worked just fine.. I\'ve read about complaints about these type of batteries being out round, and that is true an average of .012 mainly located at the top (+) were the overload device is located(.715-.727), but a device made for #18650 has more than likely compensated for this.. Even Alkaline Batteries like AA (EverReady & Duracell) are out of round an average of .006..

Jim D
2 Stars

Poor Quality
March 31, 2012
I\'ve tried to make these work for me, but unfortunately, they just can\'t handle the higher current enthusiast lights. These will probably work fine in lower draw 18650 lights, but in high current situations (IE: TK35 Turbo, TK12 Turbo, NiteCore TM11 High) they go into protection in less than 3 minutes. I\'ve relegated them to backups, but it\'s unfortunate at this price.

Fernando Laguna
5 Stars

Bang for the buck
May 19, 2011
I bought these batterys for my olight M20 and Tk11 and they work fine. Depending how much I run turbo on them these cells last for a long time. Esp now since I\'ve upgraded to the new XML lights thats come out. I plan on buying more maybe 4 more. Did I mention you wont have to buy new batteries every few weeks.

5 Stars

December 6, 2010
Just an FYI: This cell fit into my Fenix TK15 with no modifications to the wrapper. I recommend this cell.

5 Stars

Portable power plants
July 2, 2010
These are excellent batteries I use them in my fenix TA-21 with only 1 modification to make them fit better. I remove the top 1/2 inch of outer label at the positive tip end to make it slide in better. It\'s not the flashlight or the batteries fault it\'s where the battery is seamed and the label adds just a cpl thousanths of an inch in the one spot to make the battery too tight to remove easily. These are quality LI-ion\'s and worth every penny to have the power these batteries store

4 Stars

great buy
April 30, 2010
I got a pair of these batteries to go in an Olight M30 and they keep my Olight bright and working for a really long time. I use my light about 15-20 hours a week (not consecutive hours) and with a full charge they last me a weeks time.

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Tenergy TLP-4000 Universal Smart Charger for Li-Ion battery Packs 3.7V - 14.8V 1-4 cells (01281)
Regular price: $49.95
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Tenergy 30006 Li-Ion 18650 3.7V 2600mAh rechargeable battery Flat Top FULLY PROTECTED with PCB Lithium Ion
Regular price: $15.95
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UltraFire 17670 3.7V PROTECTED Li-Ion Rechargeable Battery 1800 mAh CR17670 Lithium Ion
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