Hi guys... time for my 5 year check in

A few weeks ago while driving on the hwy., I happened to notice the needle on the batt gauge dip for no apparent reason. Since it's got my attention, I notice it more and more. Not sure if this is how it always is, or if something is going on.

I notice when getting off the gas and stopping at a light/stop sign, the needed will dip and bounce back - say 1-2 widths of the needle. And even when running at hwy RPM's the needle is just to the left of the 14v hash (assuming 14v is the hash at 12:00). I could have sworn in the past the needle was just a hair to the right of the hash.

Anyway, I'm not sure if this is just paranoia or if this is something to have checked further. Auto Zone tested and said the battery/starter/alternator are all fine.

2013 4Runner Limited - all stock, no extra amps/lights etc.