Kung na-check na ang wirings nyan at ayos naman. Hindi kaya ang alternator ang may sala? Battery only works before starting your engine, pag umaandar na ang engine your alternator supplies the current the whole vehilce needs. Baka di na kumakarga yung alternator kaya nadidiskarga ang battery? Better bring it to your suking battery dealer and have the alternator and battery checked naman.

Or your vehicle's fuel line has a problem... now this is from another angle to look on if the problem still exist.

Haka-haka lang po.