You might like to check out www.nas.com/~petes/nicad/htm for an interesting discussion on NiCad memory and NiCad care. There are several quotes/ recommendations from the battery manufacturers there. You can also go to any of the search engines and look for NiCad memory. You will find several sources that do say or at least imply that NiCads have a memory but: also note who they are--most are suppliers of smart chargers or devices that will sell to those who think they may have memory problems (biased perhaps??).