This 20 euro cordless accumulator battery bush cutter has inbuilt battery. I upgraded it to changeable Li-ion 18650 batteries. Also made softer ON button for smoother work. And yes, I have a bad habit, I remove all safety buttons from my tools :D
Special thanks to my grandpa, who let me play with his tools and dismantle all his clocks and radios. Thanks to your patience, I learnt so much!