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!
The top chip is a dual N-channel mosfet (TPCS8205), the bottom is the management chip (SC451). Which is supposed to do over-current and over-charge protection.
From what I gather from the datasheet, over-current condition is detected by a voltage drop of the cell.
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