I have the Worx 56v trimmer/edger. I'll never go back to gas. I live on a corner lot, 1/4 acre. I'm able to do the yard 2x before needing to switch batteries out.
Running a heat pump here. Last bill was $230.00. 2400 sf split level, t-stat at 67f.. Burn my Buck 74 in lower lvl at night for supplemental and all day weekends. Heat pump is a newer Lennox 21 seer two stage
I have a split lvl home with my Buck 75 in the lower lvl. I use a small 9" fan at the top of the stairs blowing towards the stove. You can feel the warm air coming up the stairs as you walk down.
I started using these, they seem to be holding up good
http://www.samsclub.com/sams/10-pk-nitrile-dipped-grease-monkey/prod7480197.ip?sprodId=prod7480197&_requestid=120043