I recently (2 months ago) changed my battery. Since then at times - At idle the dash/radio lights will flicker/flutter and twice the car has shut off at idle.

Took the car to an auto electric place - turned on/off all electric goodies while idling, while they used the multi meter - Diagnosis - no battery/alternator issues.

I suspect it may be the voltage regulator..Could it be the RCM? Any ideas?