Heated Clothing GHJ 12+18V XA. The GHJ 12+18V XA heated jacket is the perfect garment from Bosch to reliably warm those who spend many hours on construction sites. As an ideal one-piece solution that keeps you warm even in harsh conditions and with minimal movement, it eliminates the need to wear multiple layers. The three-zone heating of this jacket ensures perfect heat distribution and keeps the upper body warm in any weather. The three heating levels, powered by Bosch's 12V batteries, guarantee lasting warmth. For added convenience, USB-powered devices can be easily charged through the integrated port of the battery adapter. The jacket's heating pads are powered via the GAA 12V-21 charging adapter and a Bosch 12-volt battery (included) or optionally via the GAA 18V-24 charging adapter and Bosch 18-volt battery (not included).