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Battery for Crosstrek #5393275 04/04/20 07:41 AM
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Donald Offline OP
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Wife went to drive her Crosstrek and all it would do was clicking of the solenoid. Put on a Battery Minder charger and in the morning it was all set.

Battery tests 342 CCA from the labeled 390 CCA. The internal resistance is 8.85.

No lights were left on.

Now I have no clue as to the cause. No lights left on that we found.

Next is to test with carbon pile load tester.


2015 Ford F-250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Battery for Crosstrek [Re: Donald] #5393279 04/04/20 07:48 AM
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atikovi Offline
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Originally Posted by Donald
Battery tests 342 CCA from the labeled 390 CCA.


390 CCA? Is that a garden tractor battery? After 4 years it may be time for a new battery, or at least before winter, or at least toss a jump box in the car.

Re: Battery for Crosstrek [Re: atikovi] #5393302 04/04/20 08:24 AM
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Chris Meutsch Offline
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Originally Posted by atikovi
Originally Posted by Donald
Battery tests 342 CCA from the labeled 390 CCA.


390 CCA? Is that a garden tractor battery? After 4 years it may be time for a new battery, or at least before winter, or at least toss a jump box in the car.


Subaru's have a very low CCA for whatever reason. I don't like it but I also don't own one.


2016 Toyota 4Runner Trail Premium, 58k

*RIP* 2005 Honda CR-V EX, 284k
Re: Battery for Crosstrek [Re: Donald] #5393309 04/04/20 08:32 AM
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SVTCobra Offline
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My girlfriend has the same year model and replaced her battery this past November. For the longest it would start no problem, but the reserve capacity was terrible. One day she left the hazards on at the airport with the engine off and it wouldn't start. Replaced it the next day with a new Duracell from Sam's Club.


Think twice, speak once.
Re: Battery for Crosstrek [Re: Donald] #5393316 04/04/20 08:40 AM
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ARCOgraphite Offline
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The Subaru PZEV have a pump in the fuel system that can run for a long time when the car is shut off.

Even Hours after the car was shut off and unoccupied.

I hear it all the time at night if I walk but the crosstrek - same on forester.

But, look for the cargo light that may have been left on.

But your batterry is nearing end of life.

Last edited by ARCOgraphite; 04/04/20 08:41 AM.

2019 VW Jetta S 6MT OCI#2 7378mi-MOTUL Specific VW508.00+VW Service Filter; '17 Subaru Crosstrek CVT OC#9 70254mi-Rotella
Gas Truck 5W20 + Fram Ultra 7317 Filter
Re: Battery for Crosstrek [Re: Donald] #5393333 04/04/20 09:00 AM
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Dave9 Offline
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Could be the battery is slowly wearing out and you have to decide when the worn capacity is too low (if it stays near 342CCA you can probably make it at least till winter, but at 4 years old it is probably due to be replaced because it started at low capacity so discharges deeper than a larger capacity battery would with every start... it all adds up), but for now I would charge it, leave it disconnected from the vehicle, and see if it holds a charge for several hours with minimal voltage drop. If not, definitely time to replace it, though if not a maintenance free type, pop the cover and check the water level.

Next I'd do a parasitic drain test to see if the vehicle has a power draw problem, possibly something like a door/hood/liftgate/etc latch switch is stuck, or a bad relay, faulty diode in the alternator, etc.

Last edited by Dave9; 04/04/20 09:04 AM.
Re: Battery for Crosstrek [Re: Donald] #5393368 04/04/20 09:52 AM
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irad Offline
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Add 200 mg of epsom salt(MgSO4) to each cell. Then add distilled water if cells are low. Then check that the alternator is putting out correct voltage. Check for ripple current on alternator, multi meter on ac millivolts.

Re: Battery for Crosstrek [Re: Donald] #5393369 04/04/20 09:53 AM
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Mr Nice Offline
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Buy a new battery and avoid getting stranded.

Re: Battery for Crosstrek [Re: Mr Nice] #5393370 04/04/20 09:54 AM
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atikovi Offline
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Originally Posted by Mr Nice
Buy a new battery and avoid getting stranded.


Or a jump box.

Re: Battery for Crosstrek [Re: Donald] #5393387 04/04/20 10:08 AM
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Chris142 Offline
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Is there room to put a better battery in it?


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
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Re: Battery for Crosstrek [Re: atikovi] #5393463 04/04/20 11:38 AM
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csandste Offline
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Originally Posted by atikovi
Originally Posted by Mr Nice
Buy a new battery and avoid getting stranded.


Or a jump box.

Had a Buick Encore that had a failing fuse box--can came on and ran battery down (cost me $600). Bought one of those jump boxes. Best fifty bucks I ever spent. Somebody swiped it or I left it in a hotel room charging phones. I went out and got another one and gave some to family. Saved my bacon with that Encore numerous times.

Last edited by csandste; 04/04/20 11:40 AM.

2017 Kia Soul+ Valvoline Daily Protection 5w30+ a bit of Harvest King syn 5w30-- 75,000 miles
Re: Battery for Crosstrek [Re: Donald] #5393517 04/04/20 12:37 PM
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benjy Offline
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when you change the battery get the biggest one that fits with the highest rated output + if you have stop-start turn it OFF!!

Re: Battery for Crosstrek [Re: benjy] #5393563 04/04/20 01:16 PM
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atikovi Offline
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Originally Posted by benjy
+ if you have stop-start turn it OFF!!


Nonsense! One of the better features of a modern car.

Re: Battery for Crosstrek [Re: irad] #5393581 04/04/20 01:44 PM
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SpitFire6 Online Content
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Originally Posted by irad
Add 200 mg of epsom salt(MgSO4) to each cell. Then add distilled water if cells are low. Then check that the alternator is putting out correct voltage. Check for ripple current on alternator, multi meter on ac millivolts.

Why MgSO4?


2002 206 CC 2L 4Cyl. 0W40 FS
1972 Spit 2L5 6Cyl. 0W40 FS
Re: Battery for Crosstrek [Re: Donald] #5393589 04/04/20 01:58 PM
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Rand Offline
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Some subaru batteries are notorious for low cca and not lasting.

both of my subaru batteries were replaced at 2 and 2.5 years.

yes they were 390CCA.


2019 Jeep Cherokee Trailhawk 2.0T
2020 Hyundai Elantra "Value Edition"
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