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As I'm sure you know, you can improve the dead battery odds in your favor by having one of those new-fangled battery booster packs on board. I've used my NOCO battery booster pack twice in last 3 weeks, boosting other people's dead car batteries.

Nonetheless, I'll still be replacing my Crosstrek's Panasonic Q85 battery with an Odyssey Extreme AGM battery before this new year is over.
Great advice! I have these in the cars:

 
Great advice! I have these in the cars:

Hmmm. Looks like the ratings aren't very good. It's really just another battery. And if you don't have a problem for a long time, most likely you will forget to charge it. A few years down the road, you may need it and it will be dead by then.
 
Nonetheless, I'll still be replacing my Crosstrek's Panasonic Q85 battery with an Odyssey Extreme AGM battery before this new year is over.
To be clear, the Extreme version of this battery isn't available for our car. Ours is the ODP-AGM35 which is the Performance series. I got mine at Autozone. With the core trade-in, it came to under $300.
 
Hmmm. Looks like the ratings aren't very good. It's really just another battery. And if you don't have a problem for a long time, most likely you will forget to charge it. A few years down the road, you may need it and it will be dead by then.
Very true. They only get charged when we're setting out for a long trip.
 
To be clear, the Extreme version of this battery isn't available for our car. Ours is the ODP-AGM35 which is the Performance series. I got mine at Autozone. With the core trade-in, it came to under $300.
Did something change with the 2020 battery bay? I would have thought the Odyssey extreme would fit any Crosstrek from '18+
 
Did something change with the 2020 battery bay? I would have thought the Odyssey extreme would fit any Crosstrek from '18+
I just looked it up. Same battery for the 2018 as the 2020. Possibly Odyssey doesn't offer the Extreme in our size anymore?

 
Perhaps try a specialist battery supplier in your area. If I can get an Odyssey Extreme for my new-to-me Lotus I'll be very happy.
I just got the Performance version. I'm sure it's better than the stock battery. CCA are impressive.
 
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A few days ago our 2021 Crosstrek was having a hard time to start the engine. It acted like the battery was not charged up. This morning the engine turned over a couple times & wouldn't start. I called the dealer they told me they could not do anything until we called Subaru of America to get a claim number. We called Subaru of America & they our car is not on the law suit list. So I called the dealer back. To make a long story short the dealer sent 2 people our to jump start it & take it to our Subaru dealer to figure out whats wrong. our car is barely a year old. anyone else having battery problems?
I have a 2023 Subaru Crosstrek. Bought brand new from Subaru dealership, three month ago. Over the weekend, the car went into immobilizer mode, completely died in the garage. The next day it happened, again. I called Subaru road assistance twice in a row. They came to jumpstart. It started with a few mins of charge. The guy said, “yea, it’s the battery.” Sent to the Subaru dealer the same day. They said “the car is fine, we ran all the tests, it’s fine, we can’t find anything wrong, we can’t fix it; besides you want to pay the battery on your own cost.” You are kidding me! Brand new Subaru, I have not even get the first oil change yet, **** battery! I filed a report with Subaru customer support, but man! What the heck!! You buy a brand-new car supposed to be RELIABLE and not dealing with things like that in THREE months!!!
 
I wonder if it has to do with how the batteries are treated after they are installed, presumably at the factory. If they get completely drained during shipping or while at the dealer (e.g. being a display model in the showroom) that could seriously damage the battery. I'd say you have a claim under warranty. Get an independent test from, say, Autozone.
 
I wonder if it has to do with how the batteries are treated after they are installed, presumably at the factory. If they get completely drained during shipping or while at the dealer (e.g. being a display model in the showroom) that could seriously damage the battery. I'd say you have a claim under warranty. Get an independent test from, say, Autozone.
Yup. A load tester can tell you whether the battery was damaged. They aren't expensive. The load tester simulates the draw of engine cranking. If the voltage drops below 11V during the test, the battery should be covered under warranty. If the battery passes the test, then you have a different problem.
 
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When I had my prius, about 2nd year into it, I had issues with battery (12v) being weak first thing in the morning. Dealership couldn't replicate my issue. Googled/Youtube and found the diagnostic mode.

Took pictures and video and suddenly dealership was able to replicate the issue. :eek:

New battery. Lasted 11 years.

Looks like crosstrek has something similar.
 
I wonder if it has to do with how the batteries are treated after they are installed, presumably at the factory. If they get completely drained during shipping or while at the dealer (e.g. being a display model in the showroom) that could seriously damage the battery.
Based upon what I have read about so-called "smart" alternators, a smart alternator will maintain a battery's full charge but will not fully charge a partially discharged battery. Therefore, if dealerships are not fully charging batteries with an external charger before releasing the car to the customer, that might explain some of the battery issues on relatively new cars.
 
Based upon what I have read about so-called "smart" alternators, a smart alternator will maintain a battery's full charge but will not fully charge a partially discharged battery. Therefore, if dealerships are not fully charging batteries with an external charger before releasing the car to the customer, that might explain some of the battery issues on relatively new cars.
So you're saying the alternator won't bring up the charge if the battery is slightly discharged? This doesn't make any sense.
 
So you're saying the alternator won't bring up the charge if the battery is slightly discharged? This doesn't make any sense.
It saves gas, the alternator gives less resistance to the engine.
 
It saves gas, the alternator gives less resistance to the engine.
Well it doesn't save gas when you have to call a tow truck because your battery is dead.

And really, how much gas do you save by not keeping your battery charged? Sure it's extra load on the engine, but probably less than running your headlights.
 
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Well it doesn't save gas when you have to call a tow truck because your battery is dead.
Yes, it does! It's using up the tow truck's gas not yours. Perhaps one way the Subaru engineers were able to meet the EPA requirements...? ;)
 
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