But Pat forgot to mention Christian. Don't think he lurks here.
Christian has a 22V LiPo system with voltage regulators in his full
size AS-W27. Perhaps CB or Marty can get him to opine.
For ~10x the cost of SLA, you can have over- and under- voltage
protected LiPo batteries!
Here's an example of warnings a battery retailer gives for using
Lithium packs:
http://www.batteryspace.com/warnings...batteries.aspx
Jim