I know the rule if it is over 95% you should turn on the battery to top off but I have noticed 2 things. Sometimes when I do this I immediately noticed the LED flashing (topping up) then eventually it turns off. This is fine Sometimes however the LED does not flash, just shows 4 LED On and the battery just stays on until I turn it off or it auto turns off I guess? Has anyone else noticed this? What is best should I just leave it or assume if it shows 4 green lights no flashing it has topped up then unplug it?