battery light coming on..

my battery light started coming on yesterday. it flicks on, and then stays on for a little while.
i had my battery checked 2 months ago, and the guy said it was at 70%, could it be bad by now?

i’m gonna get my battery checked tomorrow, hopefully it will be fine.

could the light be coming on due to a short?

your battery could be bad now but then again the alternator belt could be loose or the alternator itself could be bad