Is the LST300 worth it for a small yard?

Yes, if your trimming is edging, fence lines and light weeds. It is light and converts to an edger quickly. For heavy brush or large lots, a gas or higher-voltage trimmer will do better.

Does it come with a battery and charger?

It depends on the listing. Some LST300 kits include a 20V MAX battery and charger, and some are tool-only. Check the box contents before buying, since a bare tool needs a POWERCONNECT battery you may already own.

How does it compare with the LST136 or other BLACK+DECKER trimmers?

The LST300 adds auto-spool feed with POWERDRIVE and BLACK+DECKER claims 33% more run time than the prior model. It is a modest step up for convenience, not a jump in cutting power.

Can I use any BLACK+DECKER 20V MAX battery in it?

Yes. It runs on the POWERCONNECT 20V MAX line, and the nominal voltage is 18V. A larger Ah pack gives longer run time but adds weight.

How do I switch it from trimmer to edger?

Press the head release and rotate the trimmer head 180 degrees until it locks in the edger position. No tools are needed, and the switch takes a few seconds.

When is the price likely to be lowest?

Trimmers usually drop in late fall and around spring lawn-care sales. With one store at $141.58 as of November 4, 2026, watch for bundle deals that add a battery rather than a lower bare-tool price.