Polarization of aluminum organic polymer capacitor.

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I was reading

<http://www.kemet.com/kemet/web/homepage/kechome.nsf/vapubfiles/
A700%20Series.pdf/$file/A700%20Series.pdf>

and I notice a "pointy hexazoid" in the outline drawing. Duh, which
end is positive?


I am laying out a board with USB, and I was going to put a 120uF
capacitor across the power near the connector, and the part in stock
at Mouser, A700D127M006ATE0157222, caught my attention.

Why would I avoid / seek this technology?
Any guess how long these might last in a device in a home / office
environment?