There's only one way to test electric shavers properly: to use them. Our expert testers use each product for a prolonged period, testing them on various hair lengths to see how well each product copes. The most powerful electric shavers can reduce longer hairs, but cheaper models will struggle and have to be used more regularly. We also test any accessories that come with a shaver, including hair combs for trimming hair and sideburns. We evaluate how well each product copes. Battery life is important, so we see how long each shaver lasts in real use. Finally, we tell you how easy each shaver is to clean up when it's been used.