Hi BLF, sorry if this is considered as hijacking the thread. Hope it is okay to ask some 18650 related questions here 
Trying to choose some beginner’s protected 18650 cells. Noticed the following in various posts and links, but have concerns primarily the “fitting” of cell into different flashlights. Would you consider any particular of the following as “beginner proof” and “best all-rounded fitting”??
- Panasonic NCR18650B Protected 3400mAh
- Keeppower Protected 3400mAh
- ZebraLight 3100mAh
- any other good contenders?
By the way, currently don’t own any 18650 flashlight, and have been dreaming over single 18650 lights such as SRT7, SC600 MKII, PD35, SRT5, ArmyTek, etc… Oh no!! I am in trouble, hahah!! Also, I have similar questions for 14500 choice here. Many thanks!