Well i have ordered form pure smoker and abettersmoke.com. abetter seemes to have genuwine smoore products. I only want to buy smoore becuase i know sometimes knock off can sometimes be unreliable. but i have also have good luck with them as well. so what do you recommend smoore or genaric. I have both and the smoore ones seem to outlast the genaric. I also would like to know how long m401 batteries life span is months or weeks?