My brother has switched to battery almost exclusively. Not sure the brand, but he says that 2 charged batteries is all the energy HE'S got anyway. By the time they are done, he's wore out.

Just $.02, but I spend a fair amount of money having the shop go through both my says every year or 2. When they come off the shelf, I want them running "as new". A battery is great for low noise, less vibration, cutting shooting lanes or firewood, but most of the reason I keep a chain saw is for the once every 4-5 years that a tornado, hurricane, or ice storm comes through. I don't want to worry about what I'm going to do after the first 6 hours or so when the electricity may be off for 4-5 days.. Not so say I won't someday acquire a good electric saw, but there's a reason I'm still on gas.