I DON the protective gear—toughened boots, strengthened trousers, leather gauntlets, helmet and visor. Grasping the handle firmly, I release the two safety catches and press the trigger. There is no kickback, no smell of petrol and only a low whirr as the chain turns. My new battery-powered chainsaw (a birthday present to myself) is up and running.

It’s easier to use than my faithful friend of so many years—the petrol version—quieter and better for the