Start the car and then remove your battery, just be careful and keep the + terminal from touching the ground ......

 

pretty sure the car will just die if you do that.

 

Won't. All the battery does is start the car. Once that happens the alternator powers everything including the radio.

Modern battery chargers won't charge or supply voltage unless they detect voltage. They won't charge a battery that's below a certain voltage.

-- Chuck

 

Unless something has changed. I was taught the battery not only supplies amps and volts to start the car, but also acts as a surge suppresor and absorbs voltage spikes in the electrical system.

So running the car minus the battery leaves the electrical system vulnerable to spikes.

I did get my Associate Degree in Auto Technology back when carburetors roamed the earth. So things may have changed as to batteries.

But I don't think so.

 

You are correct the the battery acts as a as a suppressor of sorts but modern voltage regulators have pretty much eliminated any major benefit of it. You can run a gasoline engine on just the alternator as needed. Certainly as long as it takes to hot swap a battery into the car. Piston aircraft (and lawn mowers) have just used a magneto for a century.

Eons ago I removed the battery from my Triumph motorcycle and fitted a large capacitor for just the reason noted. Kick started the bike of course.

-- Chuck

 

Dirt bikes just started to have batteries, again. For onboard programmable ECUs. And --- of ALL THING --- electric starters. Boo!