Editing Memory effect (section)

==True memory effect==
The term "memory" came from an aerospace nickel-cadmium application in which the cells were repeatedly discharged to 25% of available capacity (give or take 1%) by exacting computer control, then recharged to 100% capacity without overcharge.<ref name=GEnote /> This long-term, repetitive [[Charge cycle|cycle]] régime, with no provision for overcharge, resulted in a loss of capacity beyond the 25% discharge point. True memory cannot exist if any one (or more) of the following conditions holds:
* batteries achieve full overcharge.
* discharge is not exactly the same each cycle, within plus or minus 3%
* discharge is to less than 1.0 volt per cell<ref name=GEnote>[http://www.repairfaq.org/ELE/F_Battery_info.html Repair FAQ, quoting GE tech note] Davolio, G., & Soragni, E. (1998). Journal of Applied Electrochemistry, 28(12), 1313–1319. doi:10.1023/a:1003452327919</ref>

True memory-effect is specific to [[sintering|sintered-plate]] nickel-cadmium cells, and is exceedingly difficult to reproduce, especially in lower ampere-hour cells. In one particular test program designed to induce the effect, none was found after more than 700 precisely-controlled charge/discharge cycles. In the program, spirally-wound one-ampere-hour cells were used. In a follow-up program, 20-ampere-hour aerospace-type cells were used on a similar test régime; memory effects were observed after a few hundred cycles.<ref>{{Cite web|url=http://www.repairfaq.org/ELE/F_Battery_info.html|title=Sci.Electronics FAQ: More Battery Info|website=www.repairfaq.org}}</ref>