thanks for the replies!

just an update: i had my battery replaced 2sm motolite enduro for 3800. 4200 ang orig price -400 daw kasi swap sa old bat. tapos nagcheck sila at nakita nila na may problema daw yung idle valve (i have 4afe engine). kapag nakaandar na yung a/c at headlights bumabagsak yung voltage ng battery to 12. wala daw problem sa alternator at starter yung idle valve lang kasi sobra daw kung umalog yung makina kaya either ipalinis or may papalitang pyesa (search ko ito sa ibang thread).

panibagong gastusin na naman! hahaha...parang may anak lang. anyways, thanks again sa mga replies!