E-bike batteries are, for the most part, a collection of 18650 batteries, packaged together and welded in series and parallel, attached to a battery management system (BMS). A "dead" e-bike battery ...

Then the doorbell rang. The dog's owner, led by the AirTag, asked if we had her dog. She explained how the dog got loose and pledged to keep a fresh battery in there from now on. My wife said goodbye ...