Small, compact and handy to use, cordless vacuum cleaners are great; but they are definitely not a replacement for the traditional corded machine. They are both fantastic, but at different jobs! Cordless vacuum cleaners use rechargeable batteries to power them. These batteries lack the ability to supply the power needed to match a corded, mains operated machine when it comes to sucking up dust and dirt. More frustratingly, the need to recharge batteries means the cleaner is not always available. When the battery dies, there is no alternative but to stop cleaning, plug in and wait: full charging times can vary from two to a lengthy sixteen hours. Running times for cordless machines vary considerably depending on the model: the shortest is quoted at around six minutes and the longest at up to an hour. Using motorised tool accessories reduces these running times. What cordless products do offer though is convenience. They are easy to carry around because they are light and can be used virtually anywhere. There is no need for a power socket and no trip hazard from a trailing cable or tangling around furniture, people or pets. They are great for cleaning cars and for spot cleaning crumbs and cobwebs. Due to their compact size, cordless vacuum cleaners may even be the answer for very small flats where storage space is at a premium. Conversely, corded, mains-operated vacuum cleaners score highly because of their power and their ability to make light work of the tough challenges of everyday cleaning. Both upright and cylinder machines are available; they offer excellent reliability day after day without ever needing to be recharged. With many models, their light weight and ergonomic design means that they are easy to use for long periods. They are versatile, often come with a wide range of accessories and are able quickly to clean large areas and thoroughly brush the pile of carpet while sucking away ingrained dirt.