https://www.ebay.com/sch/i.html?_from=R4...5v&_sacat=0

I am still using my vintage HP-45 that I got in college (for a s-pot load of money bakc in the day). Just keep rebuilding the battery pack every few years.
_________________________
Doug Ritter
Editor
Equipped To SurviveŽ
Chairman & Executive Director
Equipped To Survive Foundation
www.KnifeRights.org
www.DougRitter.com