Tom wrote;

>>After a long winter's nap, I'm trying to charge my Westy battery, but it's
>>not charging. If 5 of the 6 cells are "bubbling" and the last one isn't, can
>>I assume a dead cell?

Tom, 
Bring the battery back to the place you bought it.  You may still have warranty or they may have an extra heavy duty charger to breath some new life into it.
Last winter my battery went dead and my regular charger (12 amp) would not charge it.  I took it back and they were able to shock it back to life.
After a year the battery is still fine. YMMV
George
'85 Westfalia