hey waternut are you using the shoria charger? if so you need to ditch it and charge your shoria with a battery tender to bring it back up before the shoria will charge it. A couple guys have had this "problem' and its a simplle fix.
I'll give it a shot if I can find one but I have a feeling that it's hosed because it measures 18-19v when I try to charge it and drops back down to 6v (now) when I take the charger off.