You've come to our website, which offers answers for the Brain Test 4 game. This webpage with Brain Test 4 We need a cleaner energy for this robot answers is the only source you need to quickly skip the challenging level. This game is made by developer Unico Studio, who except Brain Test 4 has also other wonderful and puzzling games.
Find a way to make that battery cleaner. Drag the battery at the sink and wash it. Drag the washed battery back to the robot.