I have mine set to 10 pm to 9 am.
I use a normal 10W charger (18W in-box fast charger makes phone hot and degrades battery health). For me, the battery stops charging at 81% and reaches 100% in between 8.00 to 8.20 am always.
Also, even though I'm using a 10W(5V 2A) charger, the Ampere app only shows a maximum of 950mA current, which means it only charges at 5W max. The cable I'm using supports fast charging.
Can anyone explain to me why? Shouldn't it be charging at a higher current, somewhere around 1800mA?
It takes 5 hours to recharge my 6Z for dead to 100% using a 10W charger. If 6Z starts supporting the full potential of 10W charger, it can definitely recharge to full within 3 hours.