The explosion early on a June morning ignited a blaze that engulfed a New York City shop filled with motorized bicycles and their volatile lithium-ion batteries. Billowing smoke quickly killed four people asleep in apartments above the burning store.
As the ubiquity of e-bikes has grown, so has the frequency of fires and deaths blamed on the batteries that power them — sparking a push to better regulate how the batteries are manufactured, sold, reconditioned, charged and stored.
