I'm using my Exchange email account for work with the default Email app on my Nexus S running Jellybean... usually everything works just fine, but within a week or so it'll start consuming massive amounts of battery.
Flushing the data + cache and deleting / reinstalling the Exchange account usually fixes whatever went awry... until the next time the problem comes back.
I haven't tried uninstalling / reinstalling the Email app itself, as the OS cautions me not to do that with a default app.
Is there a way to fix this problem besides "Don't Use It"?