· Please do not store LEFEET S1 PRO in too high or too low temperature, too dry or too wet, direct sunlight and dust environment, which may cause damage over time. · Please fully charge LEFEET S1 PRO before storing to prevent over discharge when it doesn’t in use. · If not in use for long time, please recharge the battery every three months. · The storage temperature should not exceed the range of 14° F ~ 122° F.