The "stolen" argument seems a bit odd. Sure, anything can be stolen.
When purchasing an e-bike a removable battery was a must have. The one I wound up purchasing has a pretty heavy duty locking mechanism for the battery so I never really have to worry about it being stolen.
I'd use Safari over Chrome, but Safari has a couple of show-stopping bugs:
1. Swiping back on the trackpad to navigate backwards freezes the page for a couple of seconds. It then redraws the page with any updated elements (perhaps a refresh?).
2. The element CSS attributes in the dev tools often fail to update the DOM, duplicate with every keystroke, or revert what you have typed.
When purchasing an e-bike a removable battery was a must have. The one I wound up purchasing has a pretty heavy duty locking mechanism for the battery so I never really have to worry about it being stolen.