I don't own one, but I rode quite a few and sold a lot of them (mainly powered by Bosch systems) in a previous job. It obviously depends where you live, but mo

I don't own one, but I rode quite a few and sold a lot of them (mainly powered by Bosch systems) in a previous job. It obviously depends where you live, but most of the time, it's recommended to remove the battery for fear of theft, protection from the cold (part of the year), and (obviously) charging. Protection from theft because a battery generally represents a significant amount of the total cost of the bike. A 500 Wh Bosch battery runs around $1K, and I've seen more exotic ones run up to about $2.4k. Also, they're not that easy to steal, but someone with the intent of stealing could also damage the battery enough and compromise the weather sealing (for example) which could be a significant security risk. edit: clarification