How long can lithium batteries be stored without use?
Lithium batteries can typically be stored for 2-4 years without significant charge loss when kept at 40-60% capacity in cool (10-25°C), dry conditions. Proper voltage maintenance (3.6-3.8V per cell) and avoiding extreme temperatures maximize shelf life. Degradation occurs faster in fully charged or depleted states, with capacity dropping 2-5% annually under ideal storage conditions. Deespaek … Read more