mtomas, you never stated the MAH rating of the battery pack. Not that it matters because it sounds like you have a serious battery problem. I did a review of the Voltwatch at the site listed below. Look under Field Equipment. I have found them to be very accurate and one of them saved my Hawker Sea Fury. The Volt Watch suddenly went into the red after the 3d flight. I packed up and went home. When I tested the battery pack at home I found that 1 cell had gone bad!! Now I buy a new Voltwatch for every plane I build! They are just too good and inexpensive to not have in every plane!
http://webpages.charter.net/rcfu[