You could probably hook it up as a start. Let it sit for a minute or 2 and then start the lawnmower.. using it will charge it the rest of the way.

That's the way I would do it. I have also boosted my lawnmower with my truck when it was dead in the back shed with now power nearby.

Disclaimer: it's not my fault of you wreck something.... 😉

 

Settings would be Normal, Charge, 2a Auto (2 amperes, automatic = trickle charge) - only jump it if you have to use it now.

Lawn mower batteries are very similar to motorcycle or ATV batteries. You want to slowly charge them back up, over time.

Set the charger on 2 amps Auto and let it run overnight. It will recharge and be ready to go. I do this on all my equipment.

 

Low and slow. Or Jump starting with another battery/vehicle won't hurt it. But 2a back up to full charge is best. Just don't try charging it at 100a.

 

Thank you for the responses. I did it at 2a and have had it on all night. Just checked right now before going to bed and it turned right over. Thanks again!