Battery Power for Lawn equipment -- is it time?

I would actually prefer a Lifepo4 solution because then I could use it as a spit can for some solar panels and have some limited emergency aux power in a post-storm environment.

 

Remembering NiCd Nickel–cadmium battery - Wikipedia and NiMh rechargeables, for flashlight, camera, power tools etc. it was often quite frustrating when they would no longer charge up, and even they weren't cheap to replace back in the day. The cheap lithiums are similar. But decent lithiums are like the energizer bunny and given the right mix of battery to appliance have amazing power and run time.
The thing about conversions, is there are lots of pitfalls involved and rarely get talked about. I've have talked with others who have done conversions and others who would like to do conversions, I'm one of the latter group, and I've found that the two groups approach many projects from a way different perspective.

Anyone that's done a conversion and shares their own experiences, typically forgets some of the obvious to them details while sharing. One is the product warranty. The other is being able to observe when something is not working normally in a customized conversion. Obviously, to me anyways, there is always a risk factor in custom conversions, and that risk factor is a big part of owning one of those kinds of toys. And when the project doesn't go as planned, if t here ever even was a plan in the first place, it can be and expensive hobby.
Much more so than buying new.

 

I saw identical size spec lithium iron batteries for my lawn mower but they said not for high constant loads or something. So I got the lead acid agm batteries like it came with. There are more things involved besides size and voltage.