This string trimmer's motor tends to overheat easily, and I have seen number of them having internal motor fan melt. Verdict. It's in the top 3 bestselling string trimmers and has dozens of popular alternatives in the same price range, such as Ego Power Plus ST1501-S or Black & Decker LST540.. DEWALT DCST920 … Overall Design. This trimmer is recommended for yards up to 1-Acre. £14.50. This 20-Volt MAX 14 in. Dcst920 Runs then stops. String Trimmer features an innovative folding hinge mechanism that reduces the length by 41%** for accessible storage and quick portability. $7.99. I wanna add a week whacker to the collection, and seen the 2 of these on home depot website. Removing Old Spool Housing (Fig. I like it but what I don't like about it when u let go of thethrottle or power button u can't get rite back on it u have to wait for it to stop spinning first that sucks but other than that it's ok. No, you can buy an adapter to use 20 volt on your 18volr tools only.