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Old 04-07-2022, 09:09 AM   #1
jeff6666p
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Member#: 400078
Join Date: Aug 2014
Chapter/Region: South East
Location: hampstead/nc
Vehicle:
1998 2.5rs06wrx swap
black

Default Battery drain

I have a shorai battery lfx36. It drains down to 13.12 within 48 hrs. It should have a 12ah rating since theyre 1/3 of the normal rating. I tested for parasitic draw and only got 25 ma but the battery drains like it has a 150 ma draw.
Any idea on whati can do to figure out why the battery is draing so fast.its only 7-8 months old only been on the car 4-5 out of those. I tried emailling shorai and got no response.
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Old 04-12-2022, 03:28 PM   #2
Oranges
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I found this useful for a similar problem:
https://forums.nasioc.com/forums/showthread.php?t=2855868
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Old 05-03-2022, 08:18 AM   #3
subuser
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Since you have a low parasitic draw, it is the battery. But how are you measuring your parasitic draw? The car takes a while to go to sleep, are you leaving it hooked to a multimeter through amp draw mode for. a few hours and monitoring it? It may show 25ma draw for a few minutes then 1 hour later a higher draw might start. Look up voltage drop test over the fuses to try diagnose it that way
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Old 08-19-2022, 05:56 PM   #4
jeff6666p
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1998 2.5rs06wrx swap
black

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Quote:
Originally Posted by subuser View Post
Since you have a low parasitic draw, it is the battery. But how are you measuring your parasitic draw? The car takes a while to go to sleep, are you leaving it hooked to a multimeter through amp draw mode for. a few hours and monitoring it? It may show 25ma draw for a few minutes then 1 hour later a higher draw might start. Look up voltage drop test over the fuses to try diagnose it that way
I know its been few months but I left the hood unlatched and checked it after 20 mins and a second time after a few hours. I cant leave my meter on for a few hours it turns it self of after awhile. I checked every fuse i could there was no draw. I pulled the relays one by one with the meter connected and saw no change.
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Old 08-22-2022, 10:16 AM   #5
Cougar4
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Winestone

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If the battery voltage is only dropping down to around 13.15 volts, I think you are chasing ghosts. That is a good voltage to be at for a fully charged battery in good condition. A current draw of 25 ma. is a normal current draw after things have gone into the sleep mode. If the battery voltage got down to around 12.4 volts after a week of setting, then I would say you have a small problem.
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Old 09-24-2022, 04:11 PM   #6
PilotKD
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CWP

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Got this in the mail today:

https://www.subarubatterysettlement.com/
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