So yesterday my car wouldn't start. My battery was flat dead. Charged it up, it started up, drove it twice for a while. Then parked it. Came out today, turned the key, it started right on up. But now I have a weird problem!

With the car running and the e-brake on, the charge light comes on and my door chime starts up. Take the e-brake off and both go away. So if I drive and reach 2800rpm, it happens again! Checked the connections on my battery, they're fine. My alternator belt is on and stuff lol.

Damn it, what now?