哪些割草绳修剪机（string trimmers）具有最长的可达范围，或有哪些无绳（cordless）可选项？

Battery-powered 15 in string trimmer with EGO POWERLOAD automatic line-wind, a brushless motor, two-speed settings, and a telescoping aluminum shaft; includes a 56 V 2.5 Ah battery and charger in kit options. It offers up to about 45 minutes runtime and a professional 0.095 in dual line for robust trimming. Suits homeowners who want cordless convenience with easy line loading and adjustable shaft length.

A brushless 80V cordless string trimmer with a 17 in cutting path, Load N' Go bump-feed head, variable speed trigger, and included 2.0 Ah battery and charger. It delivers power comparable to a 30cc gas trimmer while remaining lightweight and includes an exoFLEX shoulder strap for comfort. Suited to homeowners managing up to roughly 1/2-3/4 acre yards.

The M18 FUEL Brushless String Trimmer Kit is an 18V battery-powered, brushless cordless trimmer delivering up to a 16 in cutting swath, bump-feed Easy Load head, and QUIK-LOK attachment compatibility for multiple tasks. It includes an M18 REDLITHIUM battery (kit configurations vary) and targets users needing a powerful cordless replacement for small gas trimmers with professional attachment versatility.

Brushless 40V trimmer with a carbon-fiber shaft offering 15-17 in adjustable cutting swath, compatible with Ryobi 40V batteries and available as a kit with a 6.0Ah battery and charger. It delivers gas-level power with quieter operation and a REEL EASY+ 3-in-1 head for multiple line options and faster reloads, suited for larger lawns and heavy weeds.