I also own a B&D battery machine and it is very heavy duty. This machine is much lighter, works great in some of the small areas of my yard. The nice thing is my wife can handle this machine (she can't handle the B&D), but it does such a great job and you can either mulch or put the grass bag on. It's easy to operate, the battery lasts for the entire yard, and it charges quickly. I also love the fact that we are more "green" with this and it's also much quieter. I liked this one so much that I bought one each for my two daughters for their house.
The Neuton CE 5.2 Battery-Powered Lawn Mower is fantastic! I've had a Neuton for 7 years and it is QUIET, light weight, easy to change batteries and charge, plus NO GAS, OIL, or fumes. Great for an acre of land. Our neighbors always chuckle when we mow the lawn because we can hold a conversation from 20 feet away - it's quieter than my vacuum! As with all battery powered lawn mowers, you'll need to recharge the battery immediately after using the mower - then you're ready to mow next time!