I bought a ryobi 40 volt string weed wacker kit(tool, one batt.40V 4.0 amp hr., charger). It's called expand a tool. I now have the blade cutter head, and the cultivator. I also bought one after market batt.(ebay, 40V.,6.0 amp hr).Batteries are expensive. I've used the brush blade on black berry and small sized wood(1 inch or less). The cultivator is really handy on prepared beds, loamy garden, but can be a burden to try to till ciay type soils. I can/do bust up sod. and then run cultivator. I still use my 2 cycle mantis. If you think about getting one or some of these, it might be a good idea to go somewhere and have one or all put together to get a sense of the balance. I'm also glad when the battery dies, as I'm more than ready to take a break!