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Nitecore NL2140 21700 4000mAh 3.6V 10A Protected Lithium Ion (Li-ion) Button Top Battery

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Nitecore NL2140 21700 battery upright
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Nitecore NL2140 21700 Battery

3.6V | 4000mAh | Protected Button Top

The Nitecore NL2140 is a 21700 battery capable of powering all of your brand new flashlights at peak performance. With a protected button top and 4000mAh capacity, this battery is designed for incredibly long runtimes. Not to mention that its higher voltage will easily generate higher output modes in flashlights. The NL2140 is equipped with multiple external safety features from nickel-plated stainless steel protectors to encourage good electrical conductivity and oxidation resistance and coated with a durable metallic film to guard against abrasions, this battery will last a long time in your flashlight of choice. Those external safety measures are matched by the internal safety measures within the NL2140 like high-temperature resistance, pressure relief valves, built-in PTC to inhibit high current surges and a microporous barrier that protects delicate internal components. This battery is perfectly suited for the New P12.


  • Battery Size: 21700
  • Battery Chemistry: Lithium-Ion
  • Capacity: 4000mAh
  • Voltage: 3.6V
  • Continuous Discharge Current: 5A MAX
  • Dimensions:
    • Length: 2.98"
    • Diameter: 0.86"
  • Weight: 2.57oz
Battery Size:21700
Battery Capacity (mAh):4000
Battery Chemistry:Li-Ion
Battery Voltage:3.6
Battery Terminal Type:Button Top
Battery Shelf Life:3 Years
Product Certifications:CE, RoHS
Packaging:Retail Packaging
Warranty:Battery Junction 30-Day Warranty, Nitecore 12 Month Warranty
Return Policy:Battery Junction Return Policy
Product Weight:2.57oz
Product Dimensions:2.98" (L) x 0.86" (Diameter)
Country of Origin:China
4 Reviews
50% (2)
0% (0)
25% (1)
0% (0)
25% (1)
By Dan
New charger needed
September 29, 2021
Battery is what it is but you need a new charger to charge this battery. My charger for the old p12 will not work on the new battery.
The 5000 that comes with the flash light has a charging port. I do not know why they recommend this battery. Should have been another 5000 not a 4000.
By Gary
Wichita, KS
My first try with this battery
May 29, 2020
First experience with this battery and as usual with Nitecore products it did not disappoint. Just purchased 2 more for my light.
By Tom
Not accurate description
December 30, 2019
These batteries are supposed to be 21700... 21mm diameter x 70 length but they are longer (75mm) due to the protection circuit so not a true 21700.... and they do not fit in the Nitecore charger that says will accept 21700 battery. Battery may be decent quality bit the size does not match the name.... disappointing.
By Humberto
Weston, Florida
Nitecore 21700 battery
December 2, 2019
Long lasting high quality battery with the recognized well crafted tradition from Nitecore . At excellent price and fast delivery from Battery junction. As always very satisfied with this buy. Highly recommended
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Nitecore NL2140 21700 4000mAh 3.6V 10A Protected Lithium Ion (Li-ion) Button Top Battery

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