Powerhead 500 Synchronized Smarter energy. Greater power. The STIGA battery powertrain has revolutionized the lawn mowing market by changing the petrol engine into a battery one without losing performance. Now it’s time to do it again. The new Powerhead 500 Synchronized adds a new smarter way to manage energy.. Two smart batteries working synchronized for smarter energy usage, longer life span and even greater power. SMARTER ENERGY USAGE Two smart batteries work together and concurrently inside the heart of a STIGA Lawn Mower. LONGER LIFE SPAN The simultaneous battery work creates less usury to both the batteries and the powerhead granting a longer life span. EVEN GREATER POWER Setting a new standard as the two batteries balance themselves: higher energy is delivered simultaneously and there is no need to switch battery during mowing session. 8