is my battery charger cooked?

[AquaPython]

just got a new battery, filled the acid, hooked it up to the battery charger i have had for about 5 years, not used since it was new.

i saw nothing happen at all.

i let it charge for 2-3 hours and nothing.

maybe there was a slight ticking noise coming from the positive connection.

what am i doing wrong? or is this thing broken, i heard they can be sensitive.