If your battery is dead you need to charge it with a portable battery charger set to 12 volts...10 amps...for 6 hours. You'd have to sit for at least 3 hours holding the revs at 2,000 rpm just o charge it a little. That really is a good way to fry the alternator! A battery charger is under $50. An alternator is around $150. Just go buy a battery or the correct charger. It's cheaper!

Driving the car at any speed does not refill the battery with sulfuric acid and distilled water. The older the battery the longer it takes for the *alternator to recharge it.

Check the battery cells with an inexpensive with a *battery hydrometer to see of any of the cells are discharged to the point of becoming shorted out. A battery with shorted cells will not recharge with a battery charger or alternator.

Have your battery *load tested at any store that sells new ones other than Auto Zone. A quick 15 second battery load test will tell the reserve amperage capacity. AMPERAGE soins starter motors not voltage.

If you rev the engine with the transmission in "park", yes the battery can be recharged slightly faster than if the engine was just idling. Probably wastes more gas than it is worth.

Hello

Yes but it will heat up a lot quicker than if you were driving it

Andy C

Yes, a fast idle will help.

the higher the rpm will help but idle does it too.

no

um, no?