all the battery chargers i see cheap say for lead acid only, the FF bus has a Bosch Silver Calcium battery. read on line some where that the aldi and lidl chargers are of for these. is this one ok
http://www.lidl.co.uk/cps/rde/xchg/lidl_uk/hs.xsl/index_17091.htm
http://www.lidl.co.uk/cps/rde/xchg/lidl_uk/hs.xsl/index_17091.htm