To　address　the　urgent　environmental　challenges　of　transportation　related　air　pollution　and　energy　shortage,　hybrid　electric　vehicles　(HEV)　and　battery　electric　vehicles　(BEV)　with　potential　for　higher　energy　efficiency　are　gaining　in　popularity　and　gradually　replacing　those　conventional　vehicles.　Extended　range　electric　vehicle　(EREV)　is　a　subset　of　these　new　energy　vehicles　aiming　to　gain　benefits　of　both　HEVs　and　BEVs　and　provide　a　solution　to　reducing　tailpipe　emissions　whilst　providing　satisfactory　driving-range　compared　with　tradition　internal　combustion　engine　(ICE)　vehicle　counterparts.　This　paper　systematically　introduces　the　current　developments　of　EREV　in　terms　of　the　powertrain　structure,　energy　management　and　vehicle　performance,　while　the　two　key　focus　areas　of　auxiliary　power　unit　(APU)　charging　control　and　(hybrid)　energy　storage　system　((H)　ESS)　power　management.　A　case　analysis　on　a　typical　EREV　is　presented　to　study　the　application　potential.　Comprehensive　comparisons　of　popular　APU　control　strategies　and　different　energy　storage　dispositions　are　shared,　several　existing　issues　are　also　discussed　in　this　paper.　Furthermore,　a　general　manufacturing　cost　analysis　for　different　types　of　vehicles　is　presented,　and　the　outlook　of　EREV　for　future　research　is　presented.