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I am relatively certain that people will be rebuilding old Detroit and Cummins diesel engines in heavy equipment for at least the next 50 years, if not 100. I

I am relatively certain that people will be rebuilding old Detroit and Cummins diesel engines in heavy equipment for at least the next 50 years, if not 100. I have been surprised at how much 40V/80V electric systems are cutting into what was traditionally two-stroke light engines for string trimmers and mowers. The batteries are expensive though, and I don't know how many you'd need to have in rotation to be able to keep one fully charged and ready to go under continuous usage.

fnordfnordfnord 6y ago
The batteries are expensive but when you factor the cost of fuel + oil and the hassle of dealing with it, the case for batteries doesn't look as bad.
mikestew 6y ago
For the weed trimmer and lawn mower I purchased at U. S. chain Lowes, the magic number of batteries is 3. The mower came with 2, and the trimmer with 1. The charger can charge a battery almost as fast as the mower can consume them, so the third is needed for a little slack. You could get by with only two if you're content to get a beverage between batteries. Theoretically, anyway; with our tiny yard this is seldom tested. Which why I'm annoyed by neighbors that buy a new gas-powered mower. There is not a yard within at least a 3 mile radius of me that can't be mowed by a modern, lithium-battery push mower.
vardump 6y ago
> ...I don't know how many you'd need to have in rotation... My lawn mower 5Ah @56V (EGO power) is good for half an hour. It charges from empty to full in maybe 40 minutes. In a trimmer same battery seems to last forever, maybe at least 2 hours.