Most auto parts stores have a tester specifically intended for that purpose.
Yes. How old is the battery ? . Is it the correct battery for your car/truck Are the battery terminal connections loose or corroded ? Clean ,tighten Get the battery checked at a local garage ( load test )
Then replace it.
Yes. That's what car battery chargers are for.
You can take your car to any car dealerships, auto repair shop, or AutoZone and they will be able to test the strength of your battery. AutoZone will test your battery free of charge.
touch the wires to the battery terminal
Put the red test lead on the positive and the black test lead on the negative post of the battery and see the result.
A car battery warranty can be bought at the place you got your battery from. Plus you can also bring in old battery for core money.
In my experience this usually does mean that the alternator is not sending the battery enough charge. Many auto parts stores will bench test your alternator for free, some can even test it while it is still on your car. I recommend getting it tested. They can also test your battery; you would be surprised how fast a battery can go bad. Sometimes you can get a battery that is just a lemon. I hope this is helpful.
Disconnect negative cable first from old battery and connect it last when installing new battery.
You would make a car battery comparison by comparing which car battery seems better. You shouldn't keep the old car battery near because you can get it mixed up with the newer ones.
Aplly battery voltage to it, it should jump, engage.
If alternator and battery test fine- then you may have a bad fusable link not allowing the alternator to charge the battery