Opening flight mode at night will not damage the battery, because many devices have been turned off when opening flight mode, so the battery consumption will be very small, because the battery is generally only afraid of high temperature, in high temperature conditions the battery decay will be more severe, or it is used up and recharged, which also hurts the lithium battery, and in other cases there is no harm to the battery.
It will not hurt the battery, but there is no signal, the phone, wechat can not play, played