what battery

[Ratman]

They are different things but have the same outcome, they give out power eggs

[timbernut]

They are different things but have the same outcome, they give out power eggs

Gave the misses power eggs for Xmas a few years ago, she was walking funny f weeks.

[Yournamehere]

 lobs in a dynamo and runs...

[Yournamehere]

just for clarification yer magneto part is a spinning magnet that produces a spark via a coil on engines with no battery. In a car, say, with a battery and associated electrical system, the ignition coil is energised  electrically; on yer mower there isn't always an electrical system to charge the coil so a magneto is used. It is much simpler and more robust so well suited.

The alternator is used - on larger mowers tractor mowers and cars to produce an a.c. current for lighting which is then whatsisnamed - rectified! that's the badger! - by the diodes to produce a d.c. current which charges the battery.

Just for completeness: a dynamo produces a d.c. output directly.

 

The magnets in the top of a mower are big and can also be used to find nuts and bolts dropped in long grass because after forty years you still think there's no need to put a sheet down when you do a field repair. Idiot!

 

[slim reaper]

 

https://www.briggsandstratton.com/content/dam/briggsandstratton/na/en_us/Files/FAQs/alternator_specifications.pdf