I tried it and while I did see some voltage I don't think my drill is fast enough to do produce the 13v+ you want to charge with. Now with one of those new dewalt 20v cordless drills as they claim 2000rpm. Also I'm thinking you'd need some sort of resistor to control the draw as without it the alternator will load up and the drill couldn't handle it. So the experiment was a partial success as it is doable, just impractical. I'm thinking it'd just be much easier and cheaper to keep one of those booster packs that you plug in to a car lighter in the vehicle as the drill alone is $300 and one of those boosters is $60.

nope. you need a jump, charger or a new battery. If you buy a charger you might as well buy a new battery instead. Batteries are generally under $100. Same with a charger. As for a jump. You still need a set of cables and a battery or vehicle for this.

With modern cars you need power for the fuel pump, ECU and Injectors. You need to charge the battery or get a friend to jump start it for you.

You're screwed

Call your insurance company. They can charge your battery if you have roadside assistance

old automatic transmission's you could jump start them, with excess of 30 mph, & I mean old tranny's, like 1955, but without a jump start you are sol.

Like the title says, "How to start an automatic car with dead battery?"

More specificity, if I don't have another battery or power supply to swap, charge or jump start the car for me, can I start the car mechanically? I read those article on how to roll it down the hill, push it or use a rope to spin the wheel, but they all involve the clutch, so that means it is for manual cars only?