Ring Keypad Battery Life Expectancy

Hi, I understand that it is fine to leave the Keypad plugged in - after full charging it will trickle charge. But given that the battery is not replaceable, is it better for the life of the battery to let it discharge and then recharge it as opposed to leaving it constantly charging? In some devices, the battery degrades, can loose its ability to hold full charge, and may even expand/damage the device, if left to charge constantly. Thanks.