kyhunter1
Flashlight Enthusiast
I have a ultrafire WF-500 incan. I plan on purchasing a lumens factory 630 lumen lamp for it. It uses two 18650 cells. The cells I have right now are the el-cheapo ultrafire unprotected cells. They have worked just fine to date. I would like to know if it would be possible to use two of AW's protected 18650 cells? I have heard another member say that you cannot use protected cells in series like this. Just want some clarification.