Any ideas for a replacement battery for my old style Volt Alpine (36v 400 Wh). I've got through 2 old-style batteries, in the 7 years, but the new ones for sale by Volt, for the Alpine are a different style, may not be compatible (am waiting for info from electricbikestore) are expensive and need me to buy a new charger as well. It fits in a tight channel behind the seat post, so dimensions very specific. Am considering converting to a crossbar attached, but not sure about rewiring. My current battery has a greatly decreased capacity and is heading for death. Can batteries be reconditioned? Any ideas?