I think your battery is dying na kaya ayaw ng magcharge ng husto...hindi ba't 18months warranty lang ang enduro?!?

If over na siya sa warranty at yan yung maintenance-free enduro battery, you can have it revived ghetto way - you remove the sticker sa top and pry open the battery water holes, then have it checked. Baka kulang na sa tubig or electrolytes. Maintenance free battery are generally just like old-school car batteries, they sealed off the cover para hindi magevaporate ang tubig faster thereby becoming a maintenance-free battery.