According to the article from PC World, SSD hard drives will not lose data if left unplugged for long periods of time. It seems that the original report on life span of SSDs was misquoted.
“The original presentation dates back to when Cox(the Seagate engineer who wrote the presentation) chaired a committee for JEDEC, the industry group that blesses memory specs. It was intended to help data center and enterprise customers understand what could happen to an SSD—but only after it had reached the end of its useful life span and was then stored at abnormal temperatures. It’s not intended to be applied to an SSD in the prime of its life in either an enterprise or a consumer setting.”
PC Paramedic-Computer Log 