Possible Battery problem? CEL came on.

[ViO]

So I get in the car to leave the gym today and I turn the key - the lights dim and I hear a low struggling sound- then I turn the key again while gassing the car and it starts up. This is a 2003 Tiptronic Boxster.

About 1 minute later, the Check engine light goes on, about 2 minutes later I pull into my driveway, turn the car off, go to turn it back on, and the lights start blinking / windows move up and down (as if i was opening the top when it moves the windows down a little bit) and then you just hear the clicking sound.

I tried jumping the car - and it starts perfectly fine.... but the Check engine light is on.. and I let it run for about 15 minutes, then turned it off, and tried to turn it back on... and I had the same problems... Also, the Xenons flicker although all the lights and power work...

Is this a battery issue? I'm bringing my battery to be checked locally first thing tomorrow...

If it is something more serious and the battery checks out- do you guys think I should have the car towed or jump-start it and drive it to the dealership with someone following me.

Anyone ever experience this? I had 27k miles and I've never had any problems other than a headlight and fog light go out on the car.

Also: The battery light is not on only the CEL