I've been using standard alkalines, recharged in a "BuddyL"
brand alkaline battery recharger. I swap them for a recharged
set every time I back up the zoomer; they seem to work fine.
The BuddyL rechargers are available at Radio Shacks for an
outrageous price; they're also available from mail order
places like Damark for around $20.
I have no affiliation with BuddyL, whoever they may be!
-- Sean Shapira sds@jazzie.com (206) 443-2028 <a href="http://www.jazzie.com/jazzie/">Jazzie Systems</a>