I have had mine for nearly 2 years,well 2 seasons after giving up with petrol mowers refusing to work in the spring,even when drained and dry stored. Bought a re-furb/return one a lot cheaper with just one battery which just about does my lawn in one.If it does run out of juice put it on the charger,have a cup of tea,and it will then finish the last few minutes of cutting.
Lot less hassle than a corded one,no petrol to buy,and mine is free to use as i charge it with my PV solar panels on the roof of my house!!
Have a full set of Makita powertools that use Lithium batterys,great as they dont memorise and seem to last well.
Very light and easy to use,only critisism is that the plastics are a bit flimsy,and i have managed to break the battery cover lid hinge with a clout to a tree,but all goes ok.