Fenix Elite
Newly Enlightened
I just recently bought the Fenix TK15UE. According to the manual, it says this flashlight recommended to use Fenix ARB-L18 Series and Fenix ARB-L2 Series. I have Eagletac 18650 and other brand of batteries. Can I use other brands' batteries instead of Fenix's batteries? Are the other brands are safe to use? The manual has the warning text cautioned about 18650 type of batteries.