I just noticed that I failed to pull the battery out of an old tractor when I put it up this winter.
Is it better to charge it up now and put it on a maintainer or just wait till spring and charge it up then ?
You can buy the little solar panel from harbor freight or other places that will keep the battery charged and ready----even over the winter, About $12. I keep one on my Lawn mower too. If you got a dead battery, you need to fully charge it then clip this panel on it and put the panel where it will get some sun.
Charge now then attach either that solar panel mentioned above or a "Tinder Junior". I keep my DR Field & Brush Mower battery charged by keeping a TJ on it whenever it is not being used. It works great! I use a solar panel in the front window of the van to keep that battery charged; and it works great too.
I also have a ...forgot what it is called... charger that, should the battery be dead, I can still get whatever machine needed started by using this.