TimA: Get a petrol mower..
The electric ones dont have any torque and when anything gets slightly tough they just dont have the guts.
If your mowing a boutique fine blade grass lawn sure it will be good but any standard kwii lawn i doubt it.
I agree to some degree, but in the years I've been mowing my lawn, usually regularly, I've never had an issue. Occasional my grass will get up to almost 10cm high, my electric copes with that. If you had ugly old tough grass that was more than maybe 7-8cm high maybe a petrol would be required, but for most kiwi lawns I think the electric I have would cope easily.