Electricity inverters; Inverters (electricity); Battery adaptors; Battery boxes; Battery cables; Battery charge indicators; Battery charge monitors; Battery chargers; Battery charging apparatus for vehicles; Battery holders; Battery housing covers; Battery leads; Battery packs; Battery terminals; Electric battery chargers; Power supply devices for battery chargers; Digital control apparatus for power units; Electric mains power units; Electric power units; Power units (batteries); Power units (transformers); Power units for supplying (other than generating) electrical current