jasonck08
Flashlight Enthusiast
Came across an article / 10 year lab test of some Sony 18650-HC cells. They did several different types of tests, but one of them, they did over 100,000 cycles @ ~20% DOD. I only briefly looked at the article, but its quite interesting. Seems that if you only discharged to 20% DOD, you could get a LOT of life out of a cell and it could be in service for over 10 years.
http://www.dtic.mil/cgi-bin/GetTRDoc...fAD=ADA515369
http://www.dtic.mil/cgi-bin/GetTRDoc...fAD=ADA515369