How should I maintain the battery during long-term storage? 长期存放时如何保养电池？

Store batteries in a cool, dry place at 5-25℃, charged to 50%-60%. Avoid full charge or discharge. Recharge every 3 months to maintain performance.
（请将电池存放在 5-25℃的阴凉干燥处，充电至 50%-60%。避免满电或空电存放，每 3 个月充电一次以维持性能。）