Have you checked the starter? Check cables to starter or jumping solenoid to see if it will turn over. If you have to, remove the starter and get a battery with a set of booster cables, put the starter in a vise gently and try it with booster cables directly to see if it works. If it doesn't work at that point You've already got it out so go get a rebuild or new one and put it in.
Check the starter.
It'll fail to crank over the engine despite having a fully charged battery.
When it is charging the screen reads: Battery Charging. When it is fully charged it reads: Battery Charged.
Laptops that's battery is fully charged does not weigh any more or less than one that's battery is not fully charged. If there is a difference, it would be so small you would not be able to tell.
A fully charged 12 volt automotive battery should have 12.68 volts.
where the battery bar is..it will be fully green
12v
It varies by manufacturer and battery.
A fully charged 12 volt battery will read about 12.6 volts, or 2.1 volts per cell.
Phone off: Your phone will show a full battery and say "Fully Charged" Phone on: on the right top corner your battery will show a full battery and blink
No, after the battery in your laptop is fully charged the power is cut off to it.
No, but it is good practise to fully discharge and then fully charge up your iPad on a regular basis to maximize battery life.