I am looking for a 48 volt battery with the bottom plate identical to the attached photo. Thank u fir ur help.

[Captain]

Below are photos of my 48 volt battery. Unknown manufacturer but need one similat to photo of bittom plate.

 

[ebikemom]

There are companies that will rebuild a battery. This would allow you to use the same case and connectors. Since it is an older battery, I think it's pretty doubtful that even if you found one that it would function.

See, for example, this post:
https://electricbikereview.com/foru...-of-bosch-e-bike-batteries.23868/#post-146777

This forum also has a "search" function (upper right hand corner of your computer screen)--if you search "battery" and "rebuild", lots of stuff comes up, and you may find other recommendations as well.