I'm still shaking my head in disbelief at this one. The problem would've been avoided had Boeing turned to a technology that has existed for years, and only would've required scaling-up to fit aviation needs. It's known as "Negative delta vee" detection which among other things, prevents a battery from being over-charged. Every radio with a rechargeable battery I've had since 1990 has had this ability, and that even includes the type of battery at the center of the Boeing's battery woes, the Li-on battery. C'mon Boeing, take a lesson from my fellow hams.
Paul Ahkolik, Radio Amateur W5PDA.