We've had a few cold days and my car wouldn't start anymore. It did a few 'wup wup wup-s' and that was it.

Today I tracked down my radio to be the culprit. When I measured it today I determined it to have a standby consumption of 1.44W (120mA). And that sucks the battery dry in about 10 days.

Something must have broken, as it didn't do that before. I couldn't find any obvious things like blown caps. The main amplifier gets a bit warm without any load attached and there is absolutely no signal reception anymore...

DOH!