So I'm noticing a disturbing trend in my gensacearespammers packs...I have 19 packs all told. 6 of these i bought 2-3 years ago and they are the main ones I use. All 6 of these are awesome and performing well. Most of the other 13 Gens I have either have never been used or only been used less than 6 times. (I have a tendancy to buy lipos, parts, and even kits that take me a year or two to get around to building and using on a regular basis.) Now I cycle and rebalance my lipos once ever 6 months or so when they arent in use (as far as i know this should be fine as even after 6 months they are still between 3.7 and 3.8 V/C) and 9 out of the 13 newer Gens Lipos show signs of puffiness and increases in IR. The IR of a typical brand new Gens is usually only 1 or 2milliohms but some of mine have increased to anywhere from 3 to 11 milliohms. the lower IR ones (around 3-5milliohms) still take a full charge but even after 6 or more full cycles the slight puffiness still remains. The higher IR packs only charge up to 4.15 or so Volts. they are stored indoors in my airconditioned hobbyroom. So either I'm not doing something right in terms of long term care for lipos that arent being used or rarely being used or the newer generations of Gens packs are loosing their quality control. Please feel free to leave me feedback as to which you think it might be.