Store Li-Ion batteries between 20°C and 25°C (68°F and 77°F) with 30% to 50% charge.
Do not disassemble, crush, or puncture a battery; do not short the external contacts on a battery; and, do not dispose of a battery in fire or water.
Do not leave batteries exposed to high temperatures for extended periods. Prolonged exposure to heat (for example, inside a hot car) accelerates the deterioration of Li-Ion cells.
Remove the battery if the notebook will be stored (turned off and not plugged into AC power) for more than 2 weeks.
Remove the battery from the notebook if the notebook will be plugged into AC power continuously (via a wall adapter or docking station) for more than 2 weeks.
Source of Information