blfdemigod, DayLighter and others: please note this thread: https://budgetlightforum.com/t/-/27496
The pill top on these lights is not good for high amps.... To me it looks like after the anodizing, they machined out an indented circle at about 13-14 mm in diameter and about 0.27 mm deep. I'm thinking maybe they did it to correct an elevated surface but went too deep with the machining, so they simply filled the significant gap with lots of Fujik-like grease.