Cordless lawnmower - NOT amateur radio

After some delay, I have invested in a cordless lawnmower, powered by LiIon batteries. I have charged the battery pack and will try it later. If I can only cut one lawn between charges it will not matter. I know of a few people who use cordless lawnmowers and they seem very happy.

UPDATE 1645z: Well I tried it out on two lawns. At the moment it took less than 15 minutes for each lawn. Although I recharged after doing the front lawn there seemed plenty of energy left in the battery. Next time I think I'll do both on a single charge.