I can't find the battery details to advise properly, but normal battery chargers usually work, providing the battery isn't totally flat. Also keep the cells topped up with distilled water. It should ideally be charged monthly, if not used.
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets