I found answers in the intertubes! quoth that link, * Try to avoid frequent full discharging of the Lithium battery. * For lithium battery meter calibration, periodically do a full battery discharge, every 30 charges, to increase meter accuracy. * Avoid heat, heat is the Lithium battery’s enemy, the temperature in a car can easily rise 50F in a single hour, in some cases reaching 140F. * If you plan to place your lithium battery in storage, be sure to have the charge at 40% and stored in the fridge (not freezer) for maximum battery longevity.