I worked for Skip Scooters out of San Fran, we had this same exact problem and those of us with experience in battery tech kept going to the upper management and explaining that there would be a catastrophic failure at some point. Sure enough, weeks later two caught on fire in Washington DC, one went up in the warehouse and several burned down one of the delivery vans. Shortly after they went out of business. I love battery technology but it's no joke. When it goes up in flames, you're fucked.