The new innovative lithium ion battery technology means that cordless garden machines are now a real alternative to petrol power they have all the power of petrol but are clean quiet and quick to use they are also lighter and easier to store and maintain than their petrol counterpartthis mcculloch power li nk chainsaw li 40cs has a 35cm bar and chain driven by a brushless 40v motor brushless motors are more efficient and longer lasting than brushed motors at maximum power the chain reac