We have had an Ego cordless power for 4 or 5 years now.
My partner is the main one who uses it, he is brutal to it, and it just keeps on working. No oil changes, no spark plug replacements, no buying fuel, no yanking on the rope yelling Start You Ba$tard... You just drop in the battery and mow. By the time the battery is exhausted, I'm exhausted. We get about 45 minutes mowing to a charge, and this is coarse grass, not fine lawn.
We were so impressed with it, we bought other Ego stuff - pole pruner, chainsaw, brushcutter, nylon line trimmer.
I have to boast about one bargain - the pole saw kit (power unit, pole saw head, extension pole, charger, battery) sells for about AUD$690 here.
A hardware store in a town in our region was going downhill, and got bought out by Bunnings, the big hardware chain here. The store stocked some items that were brands Bunnings didn't sell, so while the store was closed for refit to become a Bunnings, all its odd stock was shipped out to other Bunnings stores in the region and priced for quick sale - generally half original price but often less. The items were stuck on aisle ends and clearance racks at the front of the store to get them moving out quickly.
One store I went to had a few Ego tools at great prices, including two pole saws. One was under half price at $290. The other had a damaged box and labelled that the battery was missing - it had been stolen out of the box. The price had been reduced to $20. I asked staff if that was right or a mistake, they said a new battery would cost over $250 so they had dropped the price to allow for buying a new battery at full price. (Ego isn't stocked by Bunnings, so the buyer would have to source one elsewhere.) As I already had a battery for the mower, I snapped it up. I got the motor unit, pole saw attachment, strap, charger and extension pole for just $20, still with 5 year warranty. I then went to another Bunnings store across town (this town has 3 Bunnings stores) and they had Ego batteries marked down from AUD$250+ to $58. They were the smaller battery, 2.5 amp hour, but fine for the lighter tools. So I got one of those.
we recently bought a cheaper cordless mower from Aldi - not sure if they are unique to Australia or sold world wide? It's a Ferrex brand, 118 volts, takes two 56 volt packs, comes with only one charger so you have to charge one after the other, but it was only $395 and as they didn't sell well, have been reduced to $359 in stores that till have stock. The box is labelled "electric mower" instead of "cordless mower" which was silly and would have cost them sales. The batteries are fiddly to insert and release, but otherwise it is amazing - more powerful than our Ego mower, and self propelled too. (our Ego is not self propelled.) We bought it as a gift for a relative who has health issues and was having difficulty starting her petrol mower. She loves it, though she does have some trouble inserting the batteries - you have to push them in against a strong spring. A bargain.