Does it turn over?
Does it have spark?
Does it have fuel?
Yes, the battery is fully charged.
When it is charging the screen reads: Battery Charging. When it is fully charged it reads: Battery Charged.
No, a fully charged battery does not weigh more than an empty battery. The weight of a battery remains the same regardless of its charge level.
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.
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
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
A fully charged 12 volt battery will read about 12.6 volts, or 2.1 volts per cell.
It varies by manufacturer and battery.
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