I was looking to replace a battery on a Homelite 20" cordless lawn mower and found that the Homelite web site support didn't show any details on the batter replacement. So Sue pulled out a phillips screwdrive and pulled the cowling off and found two batteries wired together. It isn't a single 24 volt battery, but two 12 volt batteries wired up together.
Homelite 24 Volt Cordless Electric Mower
The Homelite mower with the cover off.
That's two 12 Volt batteries. 12 Volt, 17 Amps