https://techcrunch.com/2019/12/23/after-battery-fires-lyfts-e-bikes-are-back-in-san-francisco/

Just in time for Christmas, Lyft has brought back its pedal-assist e-bikes. The plan is to roll out hundreds of bikes each week until it hits 4,000 by the end of April 2020. This comes after Lyft had to pull its e-bikes in light of battery-related fires in July.

“After identifying the root cause of the battery issues, we made the decision to work with a different battery supplier,” Lyft wrote in a blog post last month. “We’re now receiving new batteries, testing them and reassembling ebikes.”