The purpose of mobility walkers, which are also called Zimmerframes in the UK, is to help people who can not balance and stabilize themselves while walking, such as the elderly or disabled.
Many people with disabilities find that they are restricted as to where they can go, and some people do not have the strength to use a manual wheelchair without help. A battery mobility scooter will enable them to have the freedom and independence they desire, enabling them to get from place to place without the need of a carer. They will also be able to go a lot further and up steeper hills that a manual wheelchair had not enabled them to do previously.