It seems that you have more than one problem, neither of which are simple or easy to correct. It is suggested that you have the problems analyzed by a QUALIFIED AUTO SHOP or MECHANIC. Or it could just be a broken belt.
Change your alternator
it doesn't really matter. if your battery runs out fast then you should charge it a lot.
With a 10 amp charge about 1 hour if the battery is totally dead. You should really use an automatic battery charger that shuts off when the battery is fully charged to avoid overcharging.
you should go to a car shop and get your battery checked and ask how long should u charge your battery.. or if you should get a new battery
Normally, no it should be fully charged if it is a fresh battery.
How long should I leave a battery on charge
what should the needle be on - on dashboard for the battery
You can use a universal charger. Usually they should charge any battery under 4.8v.
No, It will charge ok while connected in the motorcycle.
Yes, you can charge your iPhone when it has a good amount of battery. However, you should avoid charging the phone until it is low in battery, to prolong the battery life.
i have a scooter as well the best way for any battery charge cell phone or scooter is half charge battery when new and drain it completely half charge it again drain it once more then fully charge it and your set with scooter 12 hours should give full charge for the first
You should charge the battery with the proper battery charger. The battery charger should list what types of batteries, voltages, and charge rates (amps) it is compatible with. Make sure this matches the information on the battery to be charged. Using the incorrect battery charger can cause battery explosion, leaking, or fire.