Nitecore NL1840HP 4000mAh Rechargeable 18650 Battery
Description
Description
Next-Generation 4000mAh Battery
From Nitecore's latest battery generation, the NL1840HP stands out with an impressive 4000mAh capacity, making it an excellent choice for high-drain devices due to its continuous 10A discharge current. Endowed with Nitecore's hallmark safety features and quality engineering, the NL1840HP stands as a testament to the brand's reputation as a reliable source of rechargeable Li-ion batteries.
Premium Build with Safety Features
The NL1840HP incorporates a built-in intelligent protective circuit and a pressure relief valve, safeguarding it against overcharging, over-discharging, and short circuits. Crafted with top-tier materials, such as nickel-plated stainless steel protectors that fortify it against impacts, ensure efficient conductivity, and fend off oxidation, the battery is further coated with a durable metallic film, bolstering its resilience against abrasion. Notably, it can undergo more than 500 complete recharge cycles, making it both cost-effective and environmentally friendly.
Specifications
Specifications
| IP Rating | IPX6 |
|---|---|
| Capacity | 4000mAh 3.6V (14.4Wh) |
| Diameter | 0.73"±0.01" (18.6mm±0.3mm) |
| Length | 2.75"±0.01" (69.8mm±0.3mm) |
| Weight | 1.76 oz |
Included in the Box
Included in the Box
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Customers praised this 4000mAh battery for its extended runtime and reliability in headlamps and flashlights. Many noted it "lasts all night" and significantly outperforms lower-capacity alternatives. Some concerns emerged about compatibility—a few shoppers found it slightly larger than standard 18650s, preventing proper fit in certain devices. Overall, customers appreciated the quality and fast charging.
Great upgrade for my (vintage) MH20
My MH 20 has had the same battery it came with when it was new...but I noticed the run time wasn't what it used to be and it was due for an upgrade... Maybe it will last another 10 years
I love the batteries, I bought cheap ones at first but they couldn't even make it thru the day, but then I bought yours.. it's for a nite core head lamp, and then I got the charger for the batteries as well, I've only used one battery so far, just exchanged it for a charged one af wrk yesterday.. they last so much longer, definitely worth the extra money!!! They take awhile to charge but it's so worth it!
How should I review something I just got? All I can tell you is that I spent $40 on two batteries to replace one that quit working in less than 2 years and 15 charges. I hope these don't do the same.
I LOVE Nitecore’s products. Trust when I say you do NOT need to listen to industry standards of whats good and whats not via a IG influencer. These guys products far surpass expectations. Used in both field ops and training, I haven’t had one issue w any of their gear. Buy whatever you’re looking rn people. Warranty is off the charts too.
Excellent battery. Good charge right out of the box. Recharges quickly
Great batteries shipped from Austin rather than China
Good batteries. Keeps the light on all night at medium power setting with the occasional bright for movement in the area. My cat was scared off the first couple of times but now she likes to run past it when it goes back to medium just to see it brighten up again! Good thing that she soon gets tired of the game and leaves it alone after a bit. No worries though, the light is still on at sunrise. The originals would die out at about 3am even though it's summer now. I haven't checked the remaining charge but I think it will make it through a winter night just as well!
Great battery. Lasts a long time. Bright
Nitecore provides replacement batteries for headlamps and tactical flashlight . It beats trying to figure out what's compatible using off brand 18650 batteries. Compatible, powerful, reliable, quality 👌. Grab an extra backup battery. Better safe or get stuck in the dark.
Easy to find replacement battery and at a good price. Delivery was quick and actually arrived earlier than expected.
Great option for 18650 batteries from a great company
Long lasting and dependable batteries backed by a good company.
Best I have found!
Its all good!
Man these batteries rock !! I can have my headlight on high twice as long, fantastic buy
Works good so far
These batteries work well in my thermal scope!
Good battery holds up. Have to charge less than my other one
It’s an 18650 but it doesn’t fit into vape mod Four other 18650 batteries 3 different brands have all fit
Too expensive and took way too long to receive shipping horrible
Works good in my thermal scope application
Great batteries. Works well with my devices. Holds charge when not in use. Reliable and powerful.
Works great
This is the battery that should be standard in the HC65 V2. The garbage it came with wouldn't last 30 minutes on "turbo". I can get 90 minutes with this bettery. Besides that I hate Nitecore. Just over hyped garbage.
I like it. Everything is good and fast delivery I recommended thank you.
Great batteries,last long. Had issue with one and were very fast in getting replacement.
Great battery, I was only able to use it for a short time because my charging port malfunctioned. I hav to send my headlamp back to China for repairs. I will post more about the battery when it returns.
Charger
Longer battery time in my headlamp. Not to worry about being in the dark. Highely recommended.
Outstanding recharger. The batteries are so universal I purchased 4 of them.
