12V Battery Died, Now What?

Yesterday my 2008 12v died on me. Someone must have bumped into my car when I was away, because apparently the alarm had been going for 15 minutes and killed the 12v. A friendly stranger jumped us and got us on our way fortunately.

Here is my question, is my 12v going to be seriously damaged from this? I haven’t had any issues with slow starts or dim lights since, but I worry that the hybrid battery will be focusing a lot on charging the 12v if it is damaged and won’t hold a charge as well. The hybrid battery seems to drop a bar a little easier now, but we are also starting to use the AC as of yesterday. Has anyone had any problems after their 12v was drained on accident?

My plan is to take it to Les Schwab to get a battery health check up, but I figured I would ask the pros before.

 

Yeah I was surprised the alarm going off did that much damage to it, and now I'm guessing it did some pretty good damage to an already weakened battery. I'm not sure how old it is because I bought it used, but probably around four to five years old.

The car is used for a mixture of short commutes and longer drives. I have driven it for a handful of 30 minutes drives since it died. One thing I noticed is that there is an intermittent "whirring" noise that happens now while I'm driving. I read somewhere that this is a sign the 12v is on it's way out...any thoughts on that?

 

After doing some research on the actuator, the noise is definitely that. However, I'm not sure if it is happening more frequently or I am just now noticing it because of the battery dying. Hopefully the actuator isn't starting to go because I just replaced the HV battery and would hate to drop another 2-3 grand on this car...