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Nitecore NL2150HPI 5000mAh Rechargeable Battery for i Series Flashlights (P20i, P20iX, SRT6i, etc)
NITECORE NL2150HPi 21700 5000mAh Rechargeable Li-ion Battery

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Price: $25.95

Availability: Usually Ships in 24 Hours
Product Code: BAT-NITE-21700-NL2150HPI


NITECORE NL2150HPi At-A-Glance

  • >15A max continuous discharge current
  • Built-in pressure relief valve
  • Microporous barrier for heat dissipation
  • Built-in PTC for surge protection
  • Nickel-plated stainless steel cathode and anode

Included in the Box

  • NITECORE NL2150HPi Customized Battery

Compatible Lights

>15A High Capacity Performance Battery

The next generation 21700 customized rechargeable battery from NITECORE, the NL2150HPi has an amazing 5000mAh capacity. This powerful battery has improved performance and superior energy density compared to previous 18650 batteries. It can be charged using a traditional charger like a NITECORE UI1 or a compatible flashlight's built-in charging port.

Premium Quality Battery

The NITECORE NL2150HPi comes with all of the safety features, quality engineering, and more that have made NITECORE a trusted brand for rechargeable Li-ion batteries. Your expensive electronics are safe paired with an NL2150HPi that features a built-in pressure relief valve, a high-temperature resistant design, and built-in safeguards to prevent surges. This protects you from overcharging, over-discharging, and short-circuits. The NL2150HPi is built with premium materials, such as nickel-plated stainless steel connectors, for impact resistance, good conductivity, and resistance against oxidation. Safe and reliable, the NL2150HPi is globally insured and has multiple certifications for electronic use.

21700 Battery Buying Guide

Learn more at 21700 Battery Guide: What You Need to Know


Capacity 5000mAh
Voltage 3.6V
Output 15A
Weight 2.66oz (75.5g)
Length 3.04in (77.2mm)
Diameter 0.86in (21.9mm)

Compatible Chargers

Battery Compatibility

  • This is a customized button top battery designed for i series flashlights (see compatible lights section above).
  • It does NOT work in any non-flashlight device.
  • It does NOT work in any flashlights that require a custom battery.
  • It does NOT work in any electronics that only accept flat top batteries.
  • It can be charged in a lithium-ion charger such as UI1, UI2, UMS2, UMS4
Learn more about 21700 Batteries
Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 73 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 P20i March 18, 2024
Reviewer: George Mullen from evans, GA United States  
It is a perfect flashlight, and the customer service is A1

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  0 of 0 people found the following review helpful:
5 of 5 Good battery February 17, 2024
Reviewer: David S. from Union Dale, PA United States  
Good battery to have for extra power

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  1 of 1 people found the following review helpful:
5 of 5 Battery January 30, 2024
Reviewer: Pam Greer from Clovis, CA United States  
Didn’t realize how bad we needed a new one!

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  0 of 0 people found the following review helpful:
5 of 5 Strong battery January 15, 2024
Reviewer: James Kinsey from Boulder City, NV United States  
Really not much to say at this point. The battery is for my Nitecore SRT7i 3,000 lumen flashlight which works very well! Haven't had either product long enough to make any kind of judgement as to longevity. The battery charged just fine so I threw a couple of 18650's at it that I knew were deficient. The charger called them "poor" so, it appears to be working.

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  0 of 0 people found the following review helpful:
5 of 5 NL2150HPI 5000mah January 11, 2024
Reviewer: Anonymous Person from United States  
The battery lasts a decent amount of time and charges within the hour.

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