Anyone using Lithium batteries? Comments?

I fly RC model planes powered by Lithium Polymer batteries. They require special chargers that "balance charge" individual cells. These small battery packs are "limited life items" that need to be kept charged to a minimum of 3.7 volts per cell or they become damaged. During use, individual cell internal resistance gradually rises, causing a reduction in capacity and performance and swelling of cell packets ("puffing") requiring replacement. It is also necessary that model type battery packs need to be discharged down to a "storage" charge of around 3.8 volts per cell when not in use, or their useful life is shortened. I'm wondering how RV lipoly batteries are kept in good condition by "BMS" devices and need for monitoring and replacement.