Here is a quick sale from Ivape.net. The black bolt by Smoktech has been around a while and its a solid 3.7v device. It uses an 18500 battery and is a geat starter mod or for an extra PV. For $14.95 its a steal. His stock is low so I have no idea how long this will last. These are the version 1 (metal construction), not the plastic ones. WHERE: https://ivape.net/ $14.95