The Milwaukee M12SI‑0 is a cordless 12 V soldering iron designed for on‑site, electrical, automotive, HVAC, and field‑repair work. It’s part of Milwaukee’s M12™ REDLITHIUM™ battery system, meaning it runs on interchangeable M12 batteries (sold separately) and gives you portable soldering power without needing a mains outlet. https://omertools.com.au/product/milwaukee-m12si-0-12v-li-ion-cordless-soldering-iron-skin-only