Battery problems rarely arrive out of nowhere. Long before a car refuses to start or a phone dies at 20 percent, small ...
Pulling out your lawn mower, only to realize it won't start up, is an unfortunately common experience. Luckily, most of these problems are easy to solve.
You can jump-start a V8 with a four-cylinder car as long as you have enough amps. The number of cylinders doesn't actually matter, but weight does.