name of brushes for electric hedge trimmer?

And 98dB is the rating for the noise generated - it's not the model number.

Continuing Good Luck...
May 2017

Consider before you suspect the motor brushes that the blades might be gummed up with dried sap from cutting. If you can separate the moving blade from the fixed one a good clean might work wonders - a wire brush or wire wool and some WD40 might do the trick.

Failing brushes spark and give off a burning smell - this site might help if you need brushes...
http://www.solenttools.co.uk/carbon-brushes-3898.html

Good Luck...
May 2017