13-Inch 40V Cordless String trimmer/Edger, Battery Not Included 21332

I am happy with it but since it is my second one after 5 years of use,here is my desapointment.The only down side is i cannot use my other batteries 40 volts on it because the compagnie added a little plastic protector between the batterie contactor making the use of my previous batteries not to be usable?I had to use my old trimmer upper part connectedwith the new trimmer to be able to use my batteries so living the new upper part aside.Thanx for reading!Steve

Excellent

Got this after buying the 16 inch chain saw. I had a really old weed whacker and figured it was time to replace it. My old one was a corded electric version.I don't like the cords. Step on them, trip on them and it's a hassle. Or after time like with mine the cord would come unplugged frequently and I'd end up having to bend the prongs to try to keep it in longer.Assembly was simple. Used it to touch up the yard and it was fine. Then on to the big test - whacking down all the spring weed growth in my vegetable garden. Good news is that it had more power than my very old corded version. Auto line feed worked fine. We had a lot of rain so the weeds in my garden were significant - some of them already were about 18 inches tall and base stalk diameters were close to an inch. This thing didn't have any problems. I was able to touch up my small back yard and whack down all the garden weeds with one fully charged battery.Only downside I experienced is that removing the battery was a major pain. Before using it I plugged in a battery to see if it would work. I could barely get the battery out (yes I pushed the little battery lever). I got my spare battery out and plugged it in and tried to remove it - same thing. Maybe I haven't perfected the technique since I've only used it once but it wasn't a small deal. Both my batteries and the trimmer are really new (bought them with the chain saw) - maybe with time it won't be so hard to remove the batteries But removing the battery from the chain saw is much easier than with this. But this was the only bad thing I can think of.Updated 6-9-14: Ok, I seem to have some of the same "auto feed" problems others are experiencing. Went to wack a bunch of different weeds down that were very tall. It worked pretty good but the larger diameter weeds caused the string to break sometimes or thick vine type of weeds broke the line. It wouldn't auto feed. I took it apart and the problem seems to be with the line on the spool itself. It wouldn't auto feed because some of the line was almost anchored to the rest of the line in spots - almost too well anchored. At one point pulling on the line to break the "melt point" resulted in me breaking the line?! It was super frustrating - but I didn't want to waste the entire spool and would go through the ridiculous process of removing the spool each time the cord was too short and manually pulling longer lengths through. I purchased a 3 pack of new spools. I'll try them out and hopefully they are better. I also have trimmer line already and will try to figure out if I can re-line the existing spools somehow. No ding on number of stars just yet. Thing was a champ taking out some weeds with diameter of 1 inch not to mention how thick and tough some of the weeds were. For just regular grass it's still a champ.

I have a GreenWorks 40V Max Lawnmower but the battery is not compatible with this trimmer. Half of the product description on this page is how they have the "Largest 40V system" and "One battery fits all" but this is a lie.

The battery won't fit in.