The original by Fat Daddy directly from the USA.
Here the version 4 Low Profile, a special variation of the version 4 with not more changeable and only 1mm thick Top Cap.
Various top cap sizes and options: 15mm, 22mm or 22mm flat top (without grooves).
As well as version 4 (Regular) with up to 400° Celsius heat-resistant O-rings and insulators and integrated one-piece power connector.
Besides the building of own Mods also for the repair and for the improvement of bought Akkutragern ideally suitably.