The LST300 is the entry-level battery trimmer everyone in the extended family has owned at some point. 20V Max, 12″ cutting swath, AFS auto-feed head. It won’t do commercial work — but for a 1/4-acre lawn, it’s fine.
The AFS head itself, which auto-feeds line by centrifugal force and has a spring that fatigues. The battery tab on the tool body, which flexes. The line gets brittle faster than on gas trimmers because the tool gets stored outdoors more often.
Re-wind line every spring. Inspect the AFS head’s pawl spring each time you refill. Replace the battery-tab rail at the first sign of arcing.
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