On my Sony E-book reader the redlight comes on while it is charging, when it is charged the light goes out. I plug it in and look at it in a few hours or overnight. Likewise my phone, when the red light goes out it's charged.
OnePlus 5 review
Alice Saey's mesmerising animation for Dutch singer Mark Lotterman
iPad Pro 10.5in (2017) review
Comment booster votre iPhone ?