[crazyjr]

Here is my 2 cents on this, i have 6 batteries sitting on my computer desk right now, fully charged and been that way for a couple months. All are three+ years old and still running strong, I have always charged fully and stored them. These are Flightpower 3700 20c's and hyperion twenty 20c 3700 mah lipo's, I had some 20c maxamps (5000 and 8000) and they all puffed within a year and a half, of buying. I personally think it's in the quality of the materials used that determine the rate of which the corrosion occurs, Hyperion and flightpower (mine are the old enerland based cells) were much higher quality than the maxamps I'm sure. On the same note, i have no experience with turnigy or zippy packs from HK, so i do not know if they are the same quality as my FP and Hyperion or not