I had one of these for many years and when I finally bent the blades and the battery was worn out, I never got around to getting another one and I'm glad I did.  This is one of the handiest tools in my garage.  You can leave this hooked up to the charger cord all the time and grab it when needed.  I use this to trim ivy away from the base of my roses and trees, to trim spots along the edges and for light trimming.  It will stick and stop on anything much thicker than grass or ivy, but I've gotten used to just putting the blades flat against the ground and pulling the trimmer backwards sliding the blades on the ground.  That immediately dislodges most everything.  I take this out at least once a week to obliterate a weed or clean stuff up.  When this one gets near the end of its life, I'll get another one before it goes.