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Nitecore NL1834 18650 3400mAh 3.7V Protected Lithium Ion (Li-ion) Button Top Battery - Blister Pack

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  • High capacity ensures long run times for all of your 18650 compatible devices
  • High-performance protected circuit that prevents cells from overcharging and discharging, saving your battery from long term damage
  • Pressure relief valve activates in the event of sudden temperature increase, protecting your battery long term from any sustainable damage
  • Cost effective and environmentally-friendly battery due to its ability to recharge over 500 times
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Nitecore NL1834 18650 Battery

3.7V 3400mAh

Incredibly powerful and remarkably safe, the Nitecore NL1834 18650 Battery is the best 18650 on the market! These incredible Lithium Ion batteries deliver an impressive 3.7 Volts of power and are capable of holding a charge of up to 3400 mAh, which is 62% more than the average 18650, making them perfect for high performance devices like the intense LED flashlights from Nitecore, as well as video game consoles, appliances, and more. The NL1834 comes with a sophisticated high-performance protected circuit that prevents the cell from overcharging and discharging, which can cause long term damage to the battery. The cell is capable of being recharged over 500 times, making it not only cost effective, but environmentally friendly as well.

Safe Design

Nitecore understands that safe use of a battery is just as important as the battery's production. Designed with safety in mind, the NL1834 features nickel-plated S.S. protectors at both ends that give the cell superior impact resistance, better electrical conductivity and quality oxidation resistance. To prevent against abrasions and other external damage, the cells are coated with a durable metallic film, while its protection circuit is coated with hard plastic. The battery features a unique anode that is designed to resist high temperatures, as well as a micro-porous barrier on the interior that protects the delicate internal components. The cell even comes with a specialized pressure relief valve that will activate in the event the battery experiences rapid temperature increase.


  • Intelligent protection circuit prevents overcharging / over-discharging
  • Nickel-plated S.S. protectors on either end provide quality impact resistance, electrical conductivity, and oxidation resistance
  • Durable metallic film coating to protect against abrasions
  • Micro-porous barrier on the cell's interior protects internal components
  • Pressure relief valve activates in the event of sudden temperature increase


  • Battery Size: 18650
  • Battery Chemistry: Lithium Ion (Li-Ion)
  • Voltage: 3.7V
  • Capacity: 3400 mAh
  • Max Charging Current: 2A
  • Recommended Charging Current: 1A
  • Estimated Charge Cycles: 500 cycles
  • Max Discharge Current: 4A
  • Diameter: 0.72" (18.4mm)
  • Height: 2.72" (69.2mm)
  • Weight: 1.67 oz (47.6 g)
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
Packaging:Retail Packaging
Warranty:Battery Junction 30-Day Warranty, Nitecore 1 Year Warranty
Return Policy:Battery Junction Return Policy
Product Weight:1.679oz
Product Dimensions:2.724" (L) x 0.724" (Diameter)
Country of Origin:China
Associated Battery Sizes:168A, 18650, 19670, Protected 18650, Unprotected 18650
111 Reviews
84% (93)
11% (12)
1% (1)
3% (3)
2% (2)
By Stephen
Palm Springs, CA
Consistently great
December 23, 2016
I've only used a couple of brands of 18650 with my headlamp, and these nitecore 3400mAhn lithium batteries are fantastic. They last SO long! I am not sure if it's the light, the battery, or my imagination, but the light also stays consistently bright almost right up to the time it finally gives out before needing a charge. Sorry this is not more of a technical review, but I'm just an everyday user of a headlamp that I rely on a great deal, and the best I can offer is that I am very, very satisfied with these batteries.
  • Long, consistent light throughout the span of one charge.
  • The amount of charge, and thus the time between charges is truly remarkable.
  • All around great batteries.
  • Seems to take a long time to fully charge--but that could be because I am using the device instead of a separate charger. Still, plugging it in at night renders it fully charged by morning.
By Sean
Los Angeles, CA
Long Lasting, High Quality
December 4, 2016
I use these batteries in ALL my flashlights, high quality and fit in the varied flashlights I own. The 3400's last way much longer than the 2600 batteries I used to run and much brighter than the Panasonic 3.6V's I own. Also added bonus of protection gives peace of mind when charging, all this at a great price -even better when they're on sale!
  • Long lasting, lots of power at 3.7Vs, high quality at a great price
  • Was sent a battery that had a tear in its wrapper that started to spread, it was immediately replaced by Battery Junction -GREAT customer service!
By Gary
Rural America east of Denver
Best rechargeable battery I have used - well worth the cost
September 24, 2022
I use a high power headlamp that has a single Cree XHP70 LED - 4,000 lumens (the largest Cree LED available in a headelam). It's now powered by 3 Nitecore NL1834 18650 3400Mh protected lithium ion button top batteries. The 3 Garberiel 3000mah batteries that came with the headlamp are junk compared to the Nitecore batteries. I might get 30 minutes of useable light from the Garberiels, but get 2-3 hours from the Nitecores. In the dark, my headlamp on a focused beam is powerful enough to light the side of a hill on our property 500 ft away well enough to see the colors of our horses and the distinguish deer beyond them. Because my headlamp uses 3 batteries, I bought 2 Nitcore UMS2 battery chargers (2 batteries / charger), because each slot charges independently of the other, auto-shuts off, and can display the charging status of both batteries. Be sure to read the fine print - many chargers require you to charge in sets of 2 batteries at a time. The Nitecore batteries can handle the 1000 ma charging rate without damage, and my back-up set of Nitecore batteries are always fully charged long before the ones I am using lose enough power to make the light unuseable. I have used high power headlamps for several years and can say without reservation that I finally have a headlamp, batteries, and charger(s) that do what I need, reliable, that work better than expected, and to date are the best I have owned. Would I like a headlamp that uses three 21700 batteries? You bet, but so far haven't found one. Without question, when I do, It will be powered with Nitecore batteries, and I won't have to upgrade my chargers, becasue my UMS2 chargers also handle 21700 batteries.
By Chad
Twinsburg, OH
September 1, 2022
Works great! Will buy again.
By Gabe
One and done
July 13, 2022
After the initial charge, this battery now refuses to hold any charge. Disappointing.
9 Questions & 9 Answers
from Easton, PA asked:
June 23, 2015
How many batteries are in a blister pack?
1 Answer
These batteries are sold individually.
Submitted by: Customer Service on June 23, 2015

from RANTOUL,IL asked:
March 21, 2015
Will this work with my MH10?
1 Answer
Submitted by: Customer Service on March 23, 2015

Ken Dow
from San Francisco, California asked:
November 26, 2014
Is this a button top battery?
1 Answer
Yes, the NL189 18650 is a button top battery.
Submitted by: Customer Service on November 30, 2014

from Baltimore, Maryland asked:
November 6, 2014
Will this battery work in a Klarus XT12?
1 Answer
Yes, this Nitecore 18650 is compatible with the Klarus XT12.
Submitted by: Customer Service on November 6, 2014

from Sanford, NC asked:
September 14, 2014
Will the Nitecore 18650 Li-Ion battery (NL189) fit into a Fenix PD35 flashlight and/or a Fenix TK22 flashlight?
1 Answer
Yes, this 18650 battery will fit in the TK22 and PD35 flashlights.
Submitted by: Customer Service on September 15, 2014

from TX asked:
July 20, 2014
Will this battery work in the TM11?
1 Answer
Yes, the Nitecore TM11 is compatible with 18650 batteries.
Submitted by: Customer Service on July 21, 2014

from SWF asked:
May 22, 2014
Nitecore states it can run on 18650. I see Nitecore has several 18650 rechargeable batteries with different mAh? I know nothing about battery tech. Will the SRT run on all of the nitecore 18650? I suppose the higher the mAh number the better or longer or brighter?
1 Answer
Yes, the SRT5 is compatible with all of the Nitecore 18650 batteries. The mAh refers to the capacity of the battery, which means the higher the mAh, the longer the runtime.
Submitted by: Customer Service on May 23, 2014

from Massachusetts asked:
April 18, 2014
How long is the charge time on these?
1 Answer
It depends on the charger you are using. It varies between 1-3 hours.
Submitted by: Customer Service on April 18, 2014

from VA asked:
April 17, 2014
does this come with a charger? If not, which charger would work with it?
1 Answer
This battery does not come with a charger. The Nitecore i2 Charger or Nitecore i4 Charger would be great options to charge Li-ion batteries.
Submitted by: Customer Service on April 17, 2014

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Nitecore NL1834 18650 3400mAh 3.7V Protected Lithium Ion (Li-ion) Button Top Battery - Blister Pack

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