So, I own an IPV3 Li, Sigeli 100+, Sig 150 and have also owned many more dual cell regulated boxes. They get GREAT battery life, even at .2 and 80w I would get from the time I woke up till the time I went to sleep. My new Sig 150 TC has BAD battery life, 6 hours if I am LUCKY. I wonder if I got a bum unit or if its just the mod uses WAY morr battery life then similar mods (which doesnt make sence) Using 25rs, few months old and they are authentic. I would love a few Sig 150 TC owners to come tell me what there battery life is like before I return this for a new one. IF YOU HAVE A TC 150 PLEASE LET ME KNOW