I have a vespa 2006 LX150 and the battery won´t hold a charge. I bought the bike used and think that the battery was damaged as it is showing a voltage well over 12 volts and it won´t turn over the engine now. I want to purchase a new online battery but cannot find anywone who is selling them for this bike. I also dont know the battery dimensions as the bike is at another location since I cannot measure the battery to order a new one without a model number.