Memmory retention without battery in pioneers

[Hlib]

(03-29-2016 03:07 PM)wojtek Wrote:  My 41c (born 1981) keeps data and settings for 10 days after the batteries are taken off. The technology of the RAM memory applied in 41c was different and certainly more expensive than nowadays?

My friend once a long ago talked the same about his HP - 41, but I disbelieved him. So, it was really nearly so.