2022 Tacoma DCLB not starting after 2900 miles

Hm I’ve seen like 20 or so folks on TW with early battery issues in the last 4 years. I wouldn’t say they are notorious for that at all.

 

The original statement you made was not correct. However, I do not have a problem with your subsequent statement.

To answer your question, yes a discharged battery puts extra stress on the alternator. It is considered a load (or sink) to the alternator which is generating a voltage above that of the battery. BUT, that does not change the fact that one function of the alternator is to charge the battery.

 

You do you.

 

Of course an alternator charges the battery. How can anyone not know this?

 

While it will perform that task, that it NOT the intended purpose of the alternator. It's job is to provide power for the electrical loads. A normal starting event doesn't discharge the battery really at all. You can prove this to yourself by measuring voltage, then cranking the engine for 3 seconds or so and turning the key off, then measure the voltage again afterwards. The voltage might be lower by a .1V or so, but nothing notable. This is NOT creating a low state of charge condition which will require the alternator to work it's ass off to bring the battery back up to a full state of charge. If the alternator had to bring the battery back up from 10 or 20% state of charge every time the engine was started, the alternator wouldn't last a month. A battery CHARGER, on the other hand...is specifically designed to charge dead or low batteries.

That's what I'm trying to explain here.

 

Let's say a battery loses approximately 4% per week due to parasitic loads and chemistry if not _______ by the alternator. [Fill in the blank with the word or phrase of your choice].
Let's say a battery floating voltage is 12.8V.
.04 x 12.8 = 0.512V
A deeply discharged battery is anything below 10.5V

After about 4weeks of the alternator not ________ the battery as the vehicle is driven, the battery will be discharged to the point of irreversible damage due to deep discharge. [Again, fill in the blank].
It's unlikely you can bring it back to a "full charge" state from that condition. These deep discharges are cumulative.
You can use a "charger" (we know what you mean by this) and try to reverse some of the degradation, but a good deal of damage is already done, and it's ability to hold a full charge has been compromised.

We already went over why there's a battery in the vehicle. However to say an alternator does not ________ the battery is just plain incorrect. [See above].
You're not as misunderstood as you think you are.

 

An alternator does both jobs and is designed to do so.

 

You have no idea what you are talking about.

 

Just today for the 3rd random time my wife's 17 Wrangler was dead. Intermittently had zero.....nothing. Start with the simple things first. It was a loose negative terminal after a battery swap 3 months ago.

 

This