2003 R1150RT.

New Ballistic 12 cell battery installed prior winter storage, battery tender jr. all winter. Dealer installed battery with service (68K miles) and ran fine prior storage.

Turn key and head light is bright and all dash lights up....radio security code broken and radio reset to 00:00 indicating loss of connection. Reset clock yesterday and 00:00 again today

Engine barely turns over. Finally started yesterday. Voltage at power outlet 12.7. No start today.

I'm stuck..?

Thanks. Jim