[Greane01]

2011 MC Zetec Ecoboost with 83,000km...; for the past six months or so the battery warning light was coming on when the engine was off and the ignition was on; battery finally died, although six years out of the factory battery was pretty good. So, new battery in and low battery warning light is still coming on (again, engine off, ignition on) and the radio switches off.

This is combined with a high pitch noise from the engine bay when ignition is on AND when engine is running, which was today tracked down to the alternator. Are the two linked? Who knows; as the alternator still works, charging the battery as it should while the car is running. New alternator is around the $900 mark BEFORE labor costs... so I'm going to wait until it gets worse! Aside from that, no other issues in over 5 years.