210 variable and sealed lead acid battery unless you got plenty money then get a lithium battery I guess. Depends how much you use it. Had few led lamps and they died to quickly apart from the plr500 which is still going strong but the beam is too narrow and I struggle keeping things in beam and yes my eyes are bad. But no problem with the 210. Plus I like the old halogen light. Its where I started and where I will end. As for the blitz I have the size is just bit silly lol