I could only do it for about an hour. Drained 1 and 1/2 batteries. I covered a 6-ft by 50-ft patch. That stuff was up to my chest so basically I throw the weed wacker at it and then drag it backwards.

I still have another 3 or 4 hours worth of brush cutting to do but I can only handle an hour at a time.

The steel blades just showed up so I'll put that on and see if it makes a difference.