with 2 batteries, WORX 20V 12" 2-in-1 Cordless String Trimmer & Electric Lawn Edger, WG163, $79.99, Amazon

Amazon has WORX 20V 12" 2-in-1 Cordless String Trimmer & Electric Lawn Edger, WG163 for $79.99. Shipping is free.

2 IN 1 TRIMMER & EDGER : Easily converts from a string trimmer to an edger lawn tool in just seconds.
INSTANT LINE FEED: This grass trimmer has innovative push button command feed spool system for instant line feeding. Plus, replacement spools available through WORX PowerShare.
HEAD TILTS 90 degrees: So you can use string trimmer and edger on sloped terrain, and get to tough-to-reach places.
RUBBERIZED WHEELS: Support and guide the edger, giving you straighter lines and cleaner cuts.
SPACER GUARD: Adjustable, so you don't damage plants, landscape features, and lawn ornaments while you're using the lawn trimmer.
SPECS: 7600 rpm no-load speed, 12" cutting diameter, 5.5 lbs. machine weight, 10" cutting line length, 0.065" line diameter.
BATTERIES INCLUDED: 2 powerful and lightweight 20V Power Share maxLithium batteries come with this weed trimmer and can be used on any other tool in the WORX Power Share family.

$80