Growing tired of the same old headline.
Ok, short summary: My iPhone4 started to suck battery power again. 100 % => 10h standby => 0 %. iPhone reset => problem solved. After some syncing back and forth I also managed to transfer all important data to the newly set up iPhone. Gee, what a mess. I still do not know what caused the problem. I took the reset as an opportunity to delete (or rather not install again) some apps. Over time you collect quite some garbage. Install this, test it, crappy, don’t remove it because of heavily applied laziness.
Well. Problem solved, everybody happy. Until the menacing ghoul of technology defects visits me again -.-