190D 2.2 charge light coming on

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Howdy,

I have noticed for the past few days that the charge light is coming on intermittently when the car (1984 190D 2.2) is just started. I glow as usual, then start the car. The car starts fine but for about 1 minute, the charge light flickers. This is only really a problem in the morining. Restarting the car during the day doesn't seem to cause a problem.

The car starts fine, but it seems that the battery isn't cranking over the car as fast as it used to. I put an optima in about 1.5 years ago.

Is this a sign of an alternator about to fail, a regulator, or do I have a battery drain somewhere?

Thanks much,

Sholin