The chain comes loose so you have to keep tightening it. The chain catches frequently, can't cut through anything larger than the size of a half dollar coin without issues and it getting stuck and wanting to just stop working altogether, overheats within a few minutes of use, the battery takes several hours to charge and doesnt even last 30 minutes which by then its overheating and not wanting to run, and the chain may seem sharp to touch but isn't sharp enough for cutting dry fallen branches unless they're the size of a half dollar or smaller which you can snap those down to manageable sizes and don't need a chainsaw for them. With such poor performance within the first day of use and on old dry branches that are fairly brittle, I don't see it doing well with trimming down healthy live branches and see it being absolutely useless for the job and trying to use it for such a task would most likely be the last thing you use it for as it will burn up. It's a complete waste of money and I will be returning it.