I loved the small Nipple RDA so much I wanted to bottom feed it after hearing from @Papa_Lazarou that this is indeed possible. The design lends itself to this task perfectly and made it very easy to do.
Here are the steps I took:
Fig.1 shows base, positive pin, o ring, insulator, center post...
Inserted two brand new Tesiyi batteries in the Cuboid and they fit snug, but not overly so. After finishing a tank of juice I wanted to remove them again, but one battery did not slide out again. Long story short, the battery cover got hooked on the edge of the Cuboid battery housing and was...