If you want to maximize the life of your lithium batteries, you must know how to store them correctly. Stress can cause lithium batteries to become fragile. The ideal temperature range for them is from -20 to 60 degrees Celsius. You can also store them at room temperature. Ideally, you should discharge them to around fifty percent of their capacity before storing them. For optimal performance, you should recharge them once every year, ideally at room temperature.