Just got a wood Kamry k1000 epipe. It's great and works beautifully. I am looking to get some replacement 18350 batteries. dx.com has a good deal on SureFire 18350 1200mah 3.7 volt batteries but is says they have "no protector board". I don't know what this means or whether the kamry batteries that came with the epipe have a protector board. Just want to be sure that this is not an issue before ordering. Anyone know what a battery protector board is and whether it is necessary?