Right... for the thread's posterity, I want there to be NO question to any n00bz from today until zombies take over (lol!) that YES, you SHOULD use Li-Ion PCBs... but also that YES you CAN buy cells "unprotected"... and to beware / aware of such things. :)
I'm certainly not trying to be the grammar police, hahah... just making sure no one can say "But gee whiz, all these people at TCSS said that all Li-Ion cells are protected. Then my saber melted and set fire to my garage. What terrible people!!! GRRRRR!!!" LOL... :P