Does anyone have first hand experience dealing with a rebuilder of Lithium bicycle batteries ? Local battery stores won't touch them. Bicycle dealers won't talk about a brand they don't sell. The manufacturer apparently has gone out of business. It is a 36 V pack from a ProdecoTech Mariner8 and has "soft" LiFePO cells. The first "mail order" rebuilder I ran across looked REALLY good......but was all hype and fluff. The customer reviews included suggestions that they be tortured and shot. Now I am skiddish.