I know the Chevy "Volt" (for one) uses some kind of a lithium battery. Research shows there are several different types of lithium batteries. Most new aircraft like the "Dreamliners" are pretty complex so it wouldn't be unusual to have some teething problems (as my younger brothers says "After all it's only human"

when he deals with a complex problem). Back in one of my former lives (before teaching) I worked for a large truck dealership and it seems like every time we brought out a new generation engine we had problems whether piston failures, crankshaft keyways or fuel injection, etc.
Anyway I'm sure they'll get it solved.
Mike