I'm using an Odyssey Extreme Racing 30 with 32A/h £150 from ebay
http://micra.org.uk/threads/pollymobiles-rebuild.35251/page-15#post-437898
relocated under the passenger seat
http://micra.org.uk/threads/pollymobiles-rebuild.35251/page-16#post-439556
lighter 3.6kg flywheel
http://micra.org.uk/threads/pollymobiles-rebuild.35251/#post-381114
ultralight forged alloys
http://micra.org.uk/threads/pollymobiles-rebuild.35251/page-3#post-395713
could also remove carpet, bulkhead sound insulation, roof lining, sunroof, spare wheel, PAS, ABS, replace massive fuel tank with a smaller fuel cell, replace windows with perspex, composite body panels, remove washer system, stereo & speakers
