alot of you guys say you put the battery on a charger before installing.....however the instructions that come with the battery say it is already fully charged. I put mine on the tender anyway....and it is charging. If the battery comes fully charged....why is my tender still charging it after 20 minutes? Seems the battery was NOT fully charged. Now my horn does not work. Im not sure if this is related...when i press the horn button, i hear a buzzing noise. is the horn dead, ? or did i fuck something up?