18650 Rechargeable Battery Flat top 3.7v Lithium Rechargeable Batteries for Headlamp, LED Flashlight, 2Pack

They work so yea

I ordered these instead of getting the EFEST 18650 from eBay for my vape. These were a much better value. They are lasting a whole day and sometimes more with moderate use. My only concern is, while I have numbered each pair to keep them together, one battery in a couple pairs have had one battery still have a little bit of charge left and my vape doesn’t draw that last little bit out of it. In spite of that little fact I still would recommend these batteries. I believe that they perform well, they re-charge just fine. I’m very happy with them and recommend them. I will buy more when I need them, if I still need more down the road.

Got these for a YLL Vape, the first 2 charges the batteries did not charge right and they did not hold charge for very long. the 3rd charge i left it on the charger well past then it said it was full and that seemed to work the batteries worked much better after the "over charging"

Perfect for what I needed!!!

I've only used it a few times. It says it's charged but my pocket master keeps complaining about low battery level. So after only a few charges it can't maintain it's initial voltage. Not very good quality.

Holds charge and fits as expected

It is a common habit of battery vendors to exaggerate their capacity, and this one is not exception. So I measured real capacity for those interested. The battery was charged to 4.19V, and then discharged to 2.8V with 1A constant current. The battery showed internal resistance of 28 mOhm (decent) and capacity of ~2000 (2040) mAh. It is reasonable for mainstream 18650 batteries. It is also convenient to compare the price per 1000mAh - this is not the best from available on Amazon, but not the worst either.Because the battery delivered 40% less power than advertised, it gets 3 stars only. Make your decision to buy yourself.

Great long lasting batteries