Electra battery - single 12volt type

Hi Alan, just a thought - does your Electra still have the second, original battery box u see the seat?   If it does you might consider fitting two Motobatt AGM technology MB5U 12v 7ah, 90 amp CCA batteries in parallel.  They fit perfectly in the original battery boxes, it is incredibly simple to wire them in parallel and after two years of use I can confirm they give more than enough power to start the engine with electronic ignition from cold every time even in freezing conditions.   I started mine last week first time after it had stood in an unheated garage for two months without use and it was a frosty morning!   They are £33.54 each next day delivery from Tayna batteries.  Good luck.  Nick