yeah man def, theres a lot of tell tell signs that a battery or something in the electrical system needs to be checked. Slow windows, all the interior/exterior lights dim when your idling at a red light, specially if you have the rear defroster and AC on. Typical life on a battery is what 5 years right? Load test that jawn!
On another note, my factory toyota battery lasted the longest, almost 7 years before I replaced it. then I replaced it with a Energizer

and it failed after 3 years. I'm currently running a Bosch on 3 years and it seems to be running well.