The last few times I've had the car out, I've noticed it running rough for a while upon initial start up. Battery light illuminates, and volt meter dash gauge displays around 8-9. I have not converted headlights or dash to LED yet, so it is definitely an incandescent bulb for battery light. Once I get car moving and driving a bit, volt gauge jumps to 13 or so, battery light turns off, and car runs just fine. I thought maybe it was a low battery since the car sat for about 3-4 weeks. However, it did it again today after only a week of not being driven. After today's drive, I checked the battery with a volt meter, which read 12.5. It is a NAPA Battery with manufacture date of 08/2017. I crawled under to check out alternator as I don't see a replacement receipt at least for records I have. It's a Valeo that says "Made in France," so I figured that might be it Hmmmmm...