IMO Cordless lawnmowers are not ready for primetime, to feeble. Too expensive. When I see professionals using them I shall change.
I have a cordless hedge trimmer - not a cheap one. I have some tall Beech Hedges, about fifty foout long. I thought it would be a lifesavever not to have a lead, as I had to chuck the lead over from my summer house, to do the outside bits. What I found was that the trimmer simply did not cut through the branches as easily as a powered one (previosuly I had a rubbish Black and Decker job 25 years old). So, I went out and got another wired hedgetrimmer. This made swift work of everything and saved time. Moral?I think a battery lawnmower would do a good job, until the going gets tough, then it would struggle. I would wait for battery technology to deliver more oomph. Just my opinion.
Oh Tin pot I have answered you in your link post, still, how is the mower going?? has it been alright all summer, sounds interesting,