Nitecore NL1835LTHP Cold Weather Low Temperature High Performance 18650 Battery

I bought a Nitecore SRT9, Nitecore i2 Intellicharger, and two of these batteries for work at a summer resident camp roughly a decade ago. Today, I am still using the same flashlight and original batteries as a volunteer firefighter - they come with me to every call, and reliably hold a charge for a very long time. I have yet to have the batteries die on me during use, even during long nighttime calls on i95. I absolutely cannot have my flashlight die when facing New York-to-Boston traffic, so as crazy as it sounds, I literally trust these batteries with my life.

Haven't had the chance to use it yet, but the delivery was fast and on time. Very well packaged and grade-A customer service, too!

Product arrived in a timely manner in professional packaging. Installed the battery right away and it had a decent charge before I plugged my device in. Would purchase from them agsin.

I bought these thinking they would be better than the 4000 mah nite core batteries in single digit weather in my s60r thermal scope but they do not perform as well

I typically carry a spare 18650 battery when I’m out for a full day in cold conditions, expecting to swap it out halfway through. On a recent trip to Japan, I only needed one—the charge lasted the entire day and even covered two shorter outings without needing a recharge.

Performance in low temperatures was noticeably better than standard 18650 cells I’ve used in the past. Output felt strong and consistent throughout the day, with no sudden drop-offs that sometimes happen in the cold.

Overall, these batteries delivered exactly as promised and performed reliably in freezing conditions.

I purchased 2 of these batteries for my NOCPIX Ace L35, they have worked fine. Run time is what was expected.

Not impressed. One battery only lasted 1.5 hours on a full charge in mid 30 degree temps. Grabbed another of my pocket and only had 3 bars. The “cold weather” battery is no better than any other 18650 battery.

3 hours of run time on one and 5 hours on the other in 32 degree weather so not for sure the difference

I am not sure how I feel about these yet. I have two sets now and although I have not had any problems, my hunting buddy has had a set with twelve charges on them and they failed. I am concerned these will do the same

Man, I really had high hopes for these! Thought these were going to last much longer than a standard 18650 in my thermal scope… if anything, they might’ve been a little less operation time than the standard battery that came with the NOCPIX Ace scope. The temperature wasn’t even that cold might’ve been 36° the two nights I used them back to back, not sure if I just got a couple of bad batteries or if this is what they are? Either way, not impressed with my first two cold temp batteries but they were cheaper than the factory batteries that came with the Thermal. I will however say that the 4 bank charger I bought from Nightcore is excellent and charge is really fast!

Huge improvement over factory batteries, hold a charge in colder weather so much better. Probably twice as long as the batteries that came with my thermal scope

Awesome charge strenghth and longer delivery time..Thank You for a Great Product.

I thought a 18650 battery was a 18650 battery, apparently I’m dumb and they are not, nitecore’s 18650 is a longer than the 18650 I needed, was thinking this would work great in my thermal scope for predator hunting sub zero nights but it’s to long to fit in the scope and I have $160 in batteries I can’t use

Purchased these to power my Nitecore head lamp while going on trail runs in temperatures between -20 to -40oC. Performance to-date has been excellent, capacity seems basically totally unchanged depending upon temperature, after one year of bi-daily use charging and performance also appears un-impacted. Have been very happy with my purchase.

Performing great!

I haven't got to use them a lot but it's been 20 below when I did and they lasted longer them I did.

They have already out performed other 18650’s in weather down to 0degF. Haven’t tried -40 yet.

Love this for the Cold Alaskan winters

Prompt efficient arrival, will use again

I live in a severe weather area. We get down to sub zero temps. I want something that will work in the temperature where most batteries just die. Nitecore has solved the dilemma. I feels better about my devices working better. My mind is eased.

Battery is fine, but complete compatibility chart would be helpful. These won't work in the device I purchased them for, which wasn't totally clear.

Timely response giving me the answers I needed.

You have to charge and use them a few times but once the batteries settle they run so much longer than standard 18650s. Thanks!

Nitecore products are the best in illumination! Thank you for the easy to use site.

So far so good. Fits the Ci4 battery charger well and works in the MT21C fine.

Work great in my Fenix PD35 Tac flashlight, great product overall. Didn't take too long to charge up. 5/5.

Would this battery perform better than the one included with the purchase of the HC65v2 in moderately cool, warm, and hot areas of the southern US states?