Authentic 25RS, 3.7V Flat Top Real 2500mAh, 3.7V 18650 Rechargeable Battery(2 Pack)

These batteries have been great for my mod so far. I haven't done any scientific testing on these, but I'll leave that up to the scientists. They charge easily and fit in my device. Cannot argue with that

I wanted a few spare 18650 button top batteries for my Nicron L71 flashlights. After some disappointing results from the first batteries that I bought, I decided to test the performance of seven different brands of batteries against the Nicron batteries that came with the flashlight. The test was simple: how long would it run a Nicron L71 flashlight in its red light mode before the battery was fully exhausted. Several fully-charged samples of each brand of battery were tested in different Nicron L71 flashlights to help ensure accurate results. The test result are below, listed from best to worst. I hope that this will save you some time and money when you are shopping for 18650 batteries.10.6 Hours AllforBest by Soocool 18650 Button top 3200mAh (pink) 18.2mm X 66.5mm 46 grams9.9 Hours Taken 18650 Button top 3000mAh (black/green) 18.4mm X 67.2mm 48 grams9.5 Hours Nicron 18650 Button top 2600mAh (Orange) 18.7mm X 69.9mm 52 grams9.2 Hours DQGG 18650 Button top 3600 mAh USB C (gray/black) 18.0mm X 65.2mm 42 grams7.0 Hours CBJJ 18650 Button top 3200mAh (blue/black) 18.3mm X 67.8mm 46 grams5.6 Hours Afsongoo 18650 Button top 3000mAh (blue) 18.4mm X 67.2mm 44 grams3.5 Hours Tokeyla 18650 Button top 5000mAh (yellow) 18.2mm X 67.3mm 36 grams3.5 Hours CWUU 18650 Button top 9900mAh (green/black) 18.3mm X 67.2mm 34 grams

Worked like a charm.

Highly recommend, well worth the money.

I got these batteries and charged them up to 4.2 volts and the charger shut off. I used one battery in a flashlight for 1-1/2 hours and charged back up, they seam ok. I have not charged them all several times to tell how they will hold up. They do feel heavy like a good battery. Some other 18650 batteries are lighter and do not hold a charge to run a flashlight for over an hour on high.

Had a tactical light need one of these. Perfect replacement and no issues in the 3 months I've used them

DOA and after 24 hours on charger.

I did some searching for a better battery than previous ones I bought that have a short life. I read some reviews and found these to be the best choice. They were right. These work great! They last way longer than any others I have. Great purchase for my needs! Worth the price. Charge just fine. Thanks!