For chainsaws you’ll probably want a smaller one to start, maybe 14” or 16” max. I’ve moved a lot of my outdoor power equipment from gas to battery after a lifetime of small motor gasoline problems am delighted.
I’ve now got battery weed eater, chainsaw and blower. No snow blower for me, I live in Florida. I’ve settled on the Ego system. You want the same maker and battery commonality between tour tools. A 56V x 7.5 amp hour battery costs $400, close to double what the tool costs and you can buy tools sans battery much cheaper. I’ve got a 7.5 a 5 and a 2. The 2 will run my weed eater to last much longer than I and with every bit of the power of my gasoline ones but without the hassle.
And stepping down, my battery hand tools have almost totally displaced the 110V from yesteryear. I still have 110V slide miter and skill saw. My battery skill saw doesn’t the ability to, say, rip a sheet of 3/4” plywood easily. But impact driver, 1/2” impact wrench, 1/2” drill, jigsaw, sawzall, trim nailer, router all mostly Makita but with DeWalt and Bosch thrown in over the years have become standard. I hate power cords.