The standard covers the electrical system of an e-bike, putting its lithium-ion battery in particular through a series of stress tests to see how it reacts when overcharged, shaken, dropped, pierced, and crushed, as well as exposed to water or extreme temperatures. Quarterly audits are also required in order to maintain UL certification.
Only a small number of e-bike manufacturers comply with the standards, partly because they are voluntary but also because they can be very expensive. UL testing can cost anywhere between $30,000 to $100,000 per model, according to The New York Times, citing industry experts.
But Molyneux said that Rad Power Bikes has no intention of passing that cost along to its customers. “We’ve budgeted the cost out,” he said, “without increasing prices.”
The spate of battery fires, many of them fatal, has cast a harsh spotlight on the e-bike industry’s overreliance on cheaply made components, many of them from China. In New York, at least 92 fires, injuring 64 people and killing nine, were related to faulty e-bike batteries this year, according to the New York City Fire Department. Last year, 10 people were killed in e-bike battery fires.
Several factors have contributed to the rise in the number of fires. E-bikes are becoming more popular, especially among delivery workers in dense urban cities like New York City. Most delivery workers can’t afford higher-priced e-bikes, so they settle for those that are cheaply made — and more likely to include lower-quality battery cells. And they tend to charge their e-bikes in apartment buildings, often using mismatched chargers, further increasing the dangers.
These poorly made batteries can sometimes enter into a chemical process called a “thermal runaway,” in which one cell overheats, triggering other cells to disintegrate and release their stored energy. E-bike fires can be extremely difficult to extinguish, too, complicating the efforts by fire officials to respond quickly.
No Rad bikes have been implicated in any fires, but Molyneux said the company has a responsibility to push the rest of the industry to use higher-quality components.