I'm not worried about safety, I'm worried about having to buy a new battery every year (at a cost of >$500) because I would use an electric bike only 6 month a

I'm not worried about safety, I'm worried about having to buy a new battery every year (at a cost of >$500) because I would use an electric bike only 6 month a year at the most, and it would destroy itself during the time I'm not using it, or if I forget to charge it for a week or two, etc.