A Li-On Battery (24 - 48v) (Bellevue EH7)

Hello, I would like to repurpose/recycle an unwanted 24, 36 or 48 volt lawnmower type battery to fix up an old electric scooter. If anyone has a working one and it's charger, maybe from an old or broken lawnmower it would be put to good use. I have a bicycle so can't offer to take the lawnmower too, sorry. Some batteries can be a bit dangerous if they've been left uncharged for some time. So, I'm looking for one that has been used fairly recently. Many thanks.