Mortar is a solid brass pure mechanical mod with copper battery contacts,,it pumps out as much voltage as the battery can possibly deliver !! the large copper contacts let every bit power through ,,it is a totally awesome purely mechanical mod
recessed bottom power switch that is almost impossible to fire if you put it in your pocket
one in my avatar is version 4,,they had a short run and there are not that many around as a result ,they are at version 5 now
you can use any 18xxx battery or stacked,kickable but not with a 18650 battery i have heard [don't have a kick to verify]
i had to wait 7months to get mine,,co-ops to New Zealand and Germany took precedence over single orders
website says "pure raw power" ,they weren't kidding about it either