Nitecore NL1834 3400mAh Rechargeable 18650 Battery

This is my go to headlamp for tracking deer. The incredibly bright, white light is excellent for this job when you need to distinguish colors and moisture. After several years I needed to replace the battery. Seems to be working great again now. I've gone through many, many flashlights over the years. I'm a big fan of Nightcore's.
I also have one of Nightcore's extremely lightweight headlamps that I've used on the Appalachian Trail for nearly 350 miles.

Perfect for the ring solar path lights and the charger too. Saved a ton of money with these.

Received batterys promptly and in excellent condition. I put the battery's in my Nitecore 4 battery flashlight I have used for about 10:years (which lites up a lot of territory.) Great company and great products.

I bought 2 of these batteries for my Nitecore flashlights since my old ones finally went bad. So far so good. Charged them up completely like the instructions said and going strong. my flashlights are as bright as new like when i bought them. Id recommend the Nitecore brand batteries over the sketchy Amazon or Ebay ones any day.