Resurrecting an old post ... I was in Home Cheapo tonight to pick up stuff and plunked down over $50 for three packages of Energizer's "new and improved" Lithium batteries. I was overdue to replace my AA-fed pins, so an upgrade they will get!
Considering a remote battery pack sets you back $12+ It think this is a fair compromise, and keeps things looking stock.
Incidentally, anyone else ever personally have a Lithium puke?