After eight years (!!) of daily use and travelling, I've finally decided to retire my faithful VAIO VGN-Z, and replaced it with a Lenovo MIIX 720, mainly to get faster CPU power and graphics. What are the parameters to best store and conserve the Z so it will still be available in few cases while keeping it from degradation!? Should I start and recharge it regularly, e. g. once per month? Will the battery (Lithium - Ion) battery die if it's empty and not used for several months? Any help appreciated.