Look at voltronixusa. Amazon has them priced at $7225 for the 9 KWh. with a range of 40 to 45 miles to the 13 KWh pack that has a range of 65 miles for $8725.
Lead acid battery pack weighs 688 lbs to lithium packs weight of 200 for the9 KWh to 320 pounds for 13 KWh. pack.
You send in the controller to be reprogrammed for the new batteries.