Town ....I think it was Jack's way of saying that if you get an EFI blower and have a problem...the jokes on you. I don't read anything about an assault on a woman from that meme. So sorry if you bought an EFI...they are fun when they aren't broken.
The 7.2v battery used is as common as many car batteries - it's just a 6 cell RC car/plane/whatever pack . . . And you can't freeze NiMH, unlike lead acid if let to get too low. Seems like a really good pick from here - far more common and cheaper than small gel or AGM batteries, and likely a voltage far more compatible with a lot of the parts in use. The service info makes it look like they are basically using RC servo technology/chips for the throttle servo, and mkst other electronics run on 5 anyhow, so plenty of headroom. Heck, given the fueling curves, this is something that could likely be deployed on something like an Arduino board . . .EFI has a long enough history as a concept that there's no reason it can't work well on a snowblower. I think some of the flaws come down to trying to keep the system a little too simple and cheap. If they went to key start and had a 12v battery on board, some of the components would likely be a bit less specialized, meaning they could use more off the shelf parts, diagnostics protocols, etc. to make them easier to service.
And of course, like any piece of technology, it's hard to fix it or know why it's behaving the way it is if you don't know enough about how it works. So some implementation specific info being put out there in a good service manual that's not just aimed at scripted diagnostics would be good.