Just finished my orchard trimming and we are trying several new saws this year. I got interested in the rechargeable 18 volt saws (and tools) cuz I can charge them with my solar system. I also tried the 18 volt solar charger from Harbor Freight btw... it works ... but the inverter/plug on my battery bank that is connected to my bigger solar array works better.
If you are a prepper... go ahead and spring for the saw and the small rotating cultivator...these work and save time. The saw is completely useless on big limbs, but it is fine for small limbs. The cultivator does my 4X 6 raised beds in about 3 min... totally cool and much easier than a rototiller etc. My trick of course is I NEVER walk on my beds so I can just shove the cultivator down to the depth I want.
Have fun, keep prepping and get your seeds planted, rain collection barrels going and everything on drip!