WRT the thickness, I wonder how many mWh 2 button cells hold compared to these 0.5-1.2 mm lithium-polymers http://www.powerstream.com/thin-lithium-ion.htm http:

WRT the thickness, I wonder how many mWh 2 button cells hold compared to these 0.5-1.2 mm lithium-polymers http://www.powerstream.com/thin-lithium-ion.htm http://www.powerstream.com/thin-lithium-ion.htm and if the self discharge rate is low enough for year+ use