> they don't mention whether the batteries are held in series or in
> parallel

http://www.farnell.com/datasheets/115850.pdf

Holders like these would almost certainly be series. I don't recall
ever seeing paralleled holders

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist