hmm, I have had them about two years at storage voltage (3.8 volts)which is what they still had when I checked before disassembling them. They were still balanced and charge to 4.2 volts apiece?
I bought them before I knew much about lipos to use in my erevo but found out they wouldn't supply enough amps to run it safely before they got to me so I never used them.

Before I realized I needed to cut the wires off before desoldering the tabs (wires were sucking all the heat away) I got two of the cells a little warm to the touch near the top from keeping the iron on the tab too long...could that have damaged them? They were warm, not hot. All the cells casings are still tight, no puffing at all.