help with charging system.

[destrukshn]

hey people.
i got a problem with my charging system.
the volts on my car isn't very good.
it kinda fluctuates.
it goes from 12.2 to about 13ish volts, and sometimes spikes to 14 volts then drops down to 12.5-13 or so forth.
it's been doin it for about 2 months, due to i was lazy i couldn't be bothered fixin it, until now.
i was quite positive it would be my regulator in my alternator.
so i decided to change the whole alternator because it was getting old anyway, so i got a reco one.
but now it still kinda does it but not as bad.. more like it stabilizes at 12.8-13.2 about there or so.

so now i think it could be my battery?

any help would be appreciated.
=)

[ECU-MAN]

trying a good battery carnt hurt, check your earths.

[destrukshn]

i have checked my earths.
and nothing wrong with em.
i'm pretty sure, everything is getting a good contact from what i see..
the battery i will try on the weeekend.

thanks.