You can turn it on and it will show indication of the battery percentage. You will also notice that there is light that glows up when you connect charger. There are changes in laptops over the years. If the light is blinking then wait for it to glow continuously which will mean that it is charged. If the light orange then wait it to turn green.
ummm, i would just put brand new batteries in it i dont know any other way to know for a fact that it is fully charged :/
Not fully, but these days come more than half charged, yes.
No, mine is fully charged thank you
Yes.
No, but it is good practise to fully discharge and then fully charge up your iPad on a regular basis to maximize battery life.
get a new one:)
No, it is not true.
No it will have high conductance
Normally, no it should be fully charged if it is a fresh battery.
Rechargeable batteries normally have to be charged fully before first use.
As long as the battery is fully charged it will start no matter the condition of the alternator. Eventually the battery will run down if the alternator is not keeping it charged.
No. New smartphones usually come with batteries pre-charged up to 50% only. Usually so the store can set it up for the customer if they require.