Does it turn over?
Does it have spark?
Does it have fuel?
When it is charging the screen reads: Battery Charging. When it is fully charged it reads: Battery Charged.
If the battery is good and fully charged but the engine will not turn over then either the starter or the ignition switch is defective. Or you have a loose or corroded connection.
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.
Perhaps the alternator is not charging the battery adequately check with a voltmeter A fully charged battery should read around 12.8 (without engine running) With engine running reading should be 13.8-14.2
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.