The question no one’s asked; how much hedge? If only a few metres, battery or chord if you can stand it. If more, petrol. I have the ubiquitous 24“ Stihl which has been fantastic. I service it (sharpen and set blades, clean and set plug, grease blade drive thingumybob and clean air filter) every couple of years and it’s both powerful and reliable.
I also have a KAAZ 18″ machine for another garden with a Kwacker injun. It’s noticeably less powerful but again very reriable being Jap.
If you have lots of height/area/thickness, you may be betterer off with a pole thingumy (trimmer not gardener…).
I’d buy the Stihl again no questions asked.