I think most of these ideas are great but actually too consequential.
Chargers should have an LED that displays red while charging and green when finished. An amber LED toward the end is acceptable. I'm not making this up. I have an item that only displays solid red, when it's finished charging.
Red/green colorblindness is a thing. I would suggest a flashing lamp for charging and a steady light for charged.
I think most of these ideas are great but actually too consequential.
Chargers should have an LED that displays red while charging and green when finished. An amber LED toward the end is acceptable. I'm not making this up. I have an item that only displays solid red, when it's finished charging.
Red/green colorblindness is a thing. I would suggest a flashing lamp for charging and a steady light for charged.
That is also acceptable.