With good maintenance and care, the battery cell's life expectancy is three years. You can also expect between 300 and 500 charge/discharge cycles. To prevent the battery from overdischarge after storage, charge it to half its capacity and then store. Connect the battery to the light every 3-4 months to drain the remaining capacity. After that, charge it to 50% to continue storage. Low temperatures can affect the battery's performance and life span, particularly below freezing.