CTEK Multi XS 3600 battery charger teardown & repair

In this video, I reveal the sheer horror that resides inside one of these CTEK chargers, and I track down and remedy an issue that causes the charger to be unresponsive to the mode switch. When done, it does a good job of charging batteries at 4 or 0,65 A, but I'm not sure if one should rely too heavily on one of these.
--
THIS VIDEO IS RELEASED TO THE PUBLIC DOMAIN
To the extent possible under law, I have waived all copyright and related or neighbouring rights to this work, according to the Creative Commons CC0 affirmer. This means that anyone is free to use this content in any manner they see fit, without my objection. However, the video may still contain copyrighted content (images, video, audio, software, etc.) that does not belong to me. WHILE I DO NOT RESERVE THE RIGHTS OF ANY PART OF THIS VIDEO, THE COPYRIGHT OF THIRD-PARTY CONTENT STILL BELONGS TO ITS RESPECTIVE OWNERS. THE COPYRIGHT OF THIRD-PARTY CONTENT IS NOT WAIVED. THE VIDEO IS PROVIDED AS-IS, AND I DO NOT PROVIDE ANY GUARANTEE OF ITS QUALITY.