18650 Protected 3400mAh Li-ion Rechargeable Battery Orbtronic - For High Performance Flashlights

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18650 Protected 3400mAh Li-ion Rechargeable Battery Orbtronic

18650 High performance 3400mAh battery | Orbtronic (Panasonic inside) PROTECTED (Seiko inside) Li-ion 3.7V rechargeable cell.

Best 18650 battery for high power flashlights.

Unlike other protected 18650 batteries that will cut off all power at only 4 Amps, Orbtronic protected 18650 battery will provide power at currents much higher than 4 Amps, and let you use your high power flashlight without any interruption.

PROTECTED 3400mAh Panasonic 18650 li-ion 3.7V battery by Orbtronic - Panasonic NCR18650B 3400mAh core cell is used to build these powerful li-ion batteries.


Over-current (Activated @ 10A-12A), Over-charge (Activated @ 4.35V) - Over-discharge (Activated @ 2.5V) - Over-temp. and DUAL short circuit protection (External, and Internal).Protection circuit designed by Seiko. ICs made in Japan.

Best battery for High-Power flashlight users, or for anyone who is looking for the longest run time possible. This is one of the largest REAL capacity cells available on US market.

Very safe to operate, Orbtronic 18650 Li-ion protected battery will automatically disconnect itself from el. circuit in case of: Short circuit - Extreme temperature, Abnormally high current , Over-voltage - Over-charge, Over discharge.

Battery cell: Panasonic NCR18650B, Capacity (Ah): 3.4 Ah (3400mAh), Charging Voltage (V): 4.2 V, Energy (Wh): 12.2 Wh, Energy Density (Wh/L): 730 Wh/L, Nominal Voltage (V): 3.6V - 3.7V, Weight (g): 46 g, Diameter (mm): 18.6 mm (+/- 0.03), Length (mm): 68.9 mm (+/- 0.03) -- Top Button (Positive) made of Nickel (Ni) - Negative made of Copper (Cu) for an ideal conductivity, and durability.

Button top.

Full Dual Protection.


  • Capacity (Ah): 3.4 Ah (3400mAh)

  • Energy (Wh): 12.2 Wh

  • Energy Density (Wh/L): 730 Wh/L

  • Nominal Voltage (V): 3.6V - 3.7V

  • Charging Voltage (V): 4.2 V

  • Weight (g): 46 g /1.62 oz

  • Diameter (mm): 18.6 mm (+/- 0.03)

  • Height (mm): 68.9 mm (+/- 0.03)

  • Max. Discharge rate: 2C (6.8A)

  • Pulse current (5-6 sec.): 10A

  • Chemical Composition: Li-ion (Lithium-Ion) Hybrid

  • Cell model: Panasonic NCR18650B

  • Protection ICs: Made in Japan (Design by Seiko)

  • Bare Cell: Made by Panasonic, Made in Japan

  • Button Top: Yes

  • External |welded PCB | Protection: Yes


  • Over-charge (Activated @ 4.33V)

  • Over-discharge (Activated @ 2.5V)

  • Over-current (Activated @ 10A-12A)

  • Overheating, and dual short circuit protection (External, and Internal).



Electronic cigarette (e-cig) users: Protected 18650 batteries are larger (in diameter, and length) and are not suitable for e-cig mods. 

This 3400mAh model is made for LED flashlights, and any device that runs on protected 18650 battery.



  • Never use force to install (insert) li-ion battery.

  • Charge fully before first use.

  • Use only high quality Li-ion battery CC/CV chargers.

  • Do not expose to heat.

  • Never charge battery over 4.25V (another reason to use good Li-ion battery charger).

  • Do not charge unattended.

  • Do not store your li-ion batteries fully charged (for an extended period of time-one month and more).

  • After battery is discharged - don't leave it discharged > charge it as soon as possible.

  • Store in cold and dry place at approximately 3.6V-3.7V (Panasonic recommended storage charge).

  • Never try to charge li-ion batteries with batt. chargers that are not made for Li-ion batteries.

  • Do not try to open, or modify this battery.

  • Do not drop on hard surface (there are sensitive SMD components inside this battery).


All Batteries Are Sold Individually Unless Stated Otherwise. We sell only GRADE A cells (highest quality, and dependability by all manufacturing standards).


What is in the box?

  • Orbtronic 3400mAh 18650 Protected Li-ion rechargeable battery cell (Panasonic NCR18650B inside).
  • Battery case provided with each pair of batteries purchased
  • Safe packaging


Price listed is for one battery cell.

We ship very fast from Florida - USA.


Unprotected Flat or Button top 18650 batteries are also available:


3500mAh 18650 High Drain Hybrid IMR Rechargeable Battery 3.7V Flat or Button top Orbtronic


18650 30A 2100mAh 18650 battery High Drain Hybrid IMR 3.7V Orbtronic

34 Reviews Hide Reviews Show Reviews

  • 5
    18650 Best Batteries

    Posted by Stephen D. on May 9th 2017

    I finally found my "Go-To" batteries for all my Tactical/Every Day Carry Flashlights. I've tried many brands over the last few years. I was using Panasonic protected cells made in Japan for my primary batteries up til my discovery of Orbtronic.com and their Orbtronic batteries. The Panasonic cells are now kept as my back-ups. I currently have all my flashlights loaded with Orbtronic 18650 protected cells. Thank You Orbtronic.com!!!!!

  • 5
    Best in the industry

    Posted by Jay J. on May 4th 2017

    I think these batteries are the best anyone will find to buy i own 12 of them between3400 and 3500 all last a long time and keep the power flowing. You will never be disappointed with them.

  • 5
    Best 18650's Fastest Shipping....

    Posted by Diego on Apr 21st 2017

    I mainly use Fenix and Zebralight flashlights. I went through the Ebay experience of buying the "Fire" batteries. Orbtronics has the best, longest lasting quality batteries I have ever used. The shipping is insanely fast. I don't buy batteries from anyone else anymore.

  • 5
    Consistently Excellent Quality!

    Posted by RICHARD H. on Apr 18th 2017

    My company makes Ghost Lightâ„¢ night-vision lights and we've been using and reselling Orbtronic batteries for years. We've been very happy with the quality of service and the quality of the batteries. In fact, these are the only batteries we offer to our customers because there is simply nothing better available and we have tried them all.

  • 5
    Best 3.7V Li-ion Rechargeables

    Posted by Allan W. on Apr 11th 2017

    Terrific capacity and stability. Highly recommended.

  • 5

    Posted by Ronald L. on Apr 11th 2017

    These BATTERIES are AWESOME in my 4000 lumen Dive Flashlight ! The web site and shipping are second to none ! Buy one of there chargers to match the batteries you will not be disappointed. Customer service is Awesome for any of your questions.

  • 5
    Great battery

    Posted by steve t. on Apr 10th 2017

    Battery keeps it's charge for a long time, even better than competition. The battery performs so well that I wouldn't think of using any other.Colleagues were impressed by its performance too.

  • 4
    I will buy again

    Posted by Kevin B. on Apr 10th 2017

    Good batteries and would purchase again.

  • 5
    Orbtronic 3400 Protected

    Posted by TECHNAVA on Mar 27th 2017

    Received 4 of these guys in just 3 days halfway across the country. They arrived at 3.6V and charged them up the medium setting 1A using the Xtar SP2 that also came in this order. My cheap meter reads 4.17 which is perfect for all the batteries. I have quite a few lights and almost all run at high current levels. Most of these lights are NiMH, but if I am going to buy Li-ION, I'm going to get top quality stuff and these use the best high capacity protected cells. These cells come individually wrapped and in a fitted foam box along with a Orbtronics battery case. Best shipping presentation I've seen.

  • 5
    Wider and More intensed beam

    Posted by George L on Mar 24th 2017

    Battery: Orbtronic 3400mAh
    Flashlights: ebay (CreeeXML-T6), Nitecore EC20

    I purchased 2 CreeXML-T6 flashlights from eBaby that came 18650 Ultrafire 3800mAh batteries, that worked ok and were bright.
    After swapping in the Orbtronic 18650 now I know what bright really is. The light beam coverage is wider and more intense.
    The Orbtronic batteries are physically wider and longer than the Ultrafire but they fit without issue in my lights.
    Flashlight #1 (inner diameter = 19.06mm)
    Flashlight #2 (inner diameter = 18.91mm)
    Flashlight #3 Nitecore EC20 (inner diameter = 18.92mm)

    BTW, the Nitecore EC20 with the Orbtronic trumps my no name brand lights, and it's half the size.

    I also purchased Orbtronic 14500 batteries, please other review.

  • 5
    More than awesome cells!

    Posted by Sharon on Mar 19th 2017

    I purchased these Orbtronic 18650 3400mAh cells for use in my Fenix TK75 about a month ago and I would recommend anyone with a serious flashlight to purchase them! High drain is no issue with these cells. They run forever it seems. Coupled with a good Li-ion charger they will not disappoint you! They have drastically improved my runtime over all other cells I have used. Protection cells in these batteries are also top notch! thanks for the wonderful product!

  • 4
    Initial satisfaction!

    Posted by Mike on Mar 12th 2017

    I just got some of the 18650 3400 mAh batteries. I am not advanced enough to have a voltage meter. and run all sorts of tests! I am sure I could learn,it is probably simple!

    I do know that when I used Ultrafire 3600 mAh batteries[ more like 2100!] in my Jetbeam BC40, they only last about 55 minutes on high. Last night I put Two of the 3400 mAh Orbtronic in and it lasted Two hours and Fifteen minutes!!

    Now, I know there are also other important features to consider besides run time, but that is important to me. I walk my Siberian about 90 minutes every night,,,,carry two lights with me.

    Lot's of statistics, factors and variables to consider. Price, safety, durability and features.

    This is NO doubt a much better and diversified battery than the Cheap Chinese batteries I was getting. However, the test in my mind will be determined when the life of battery ends and how many cycles I get along with the aforementioned information.

    Bottom line,[so far] these Orbtronic are much better, However, they cost Four[4] times as much as these ultrafires I have.

    The final"Verdict" will not be determined until more testing is done!

    One thing that concerns me is that the Orbitrol 3400 mAh are about 1/8 of an inch longer which may present a problem for this new"FLASHAHOLIC"! I struggled to get them in my trustfire[takes three Batteries]

    For first time use I rate these as "GREAT" Batteries! I just hope the "Protection features it has work!! Because when I tested Total run time last night, the light went completely Out after 135 minutes [2 hours and 15 minutes!]. I would think it just went into Sleep Mode,,,,I hope so!they are charging now!
    Happy Holidays everyone and Thanks Sal for your promptness and efficiency!!
    ciao,,,,Roberto Capo di Capo;

    STAR RATING IS 4.5 ! I could not get that half a star,,,,,,,Down the road, I have a feeling it will change to 5 Stars!

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