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12V battery at 10.35V reading from my multi-meter

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HS 250h Model (2010-2012)

12V battery at 10.35V reading from my multi-meter

Old 10-11-18, 09:38 PM
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TLPLEXUS
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Default 12V battery at 10.35V reading from my multi-meter

My HS250h took a couple of times to turn on this week (ready light doesn't come on until i hit the button a couple of times). it only happen in the morning when the car is cold.
So I used my multi-meter to check against the battery and the reading is 10.35V when the car is off. It ranges from 9.89V to 14V during crank and remains above 14.xx V once the car is on.

Is my battery slowly dying and should it be replaced? I am not sure if these gem type battery has a different standstill voltage vs regular car's 12V battery.

I noticed some of you have already changed your batteries. It may be time since it is 8 years now.

https://www.clublexus.com/forums/hs-...tery-dead.html
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Old 10-12-18, 07:38 PM
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Magellan55
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Probably not worth playing around - just get a new one. Otherwise, you'll end up with a dead battery, and Murphy's law says it will happen at the worst time / place.
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Old 10-12-18, 11:00 PM
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Sounds good. i will start removing the old one out and getting it replaced.
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Old 10-13-18, 03:44 PM
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Went to Crown Lexus in Ontario, CA to pick up a new battery. Here are the pictures for this installation.







10mm socket is all you need.

open the right vinyl cover to access the 12V battery.

Remove negative/positive terminals and vent hose from the battery. Remove the clamp to remove the battery.

Low voltage for this one


New battery from the dealer. Like the packaging here.


The new one looks good with the voltage.

New Panasonic battery here.

Replace the battery and place everything back.

The car will reload the system upon starting the car. Had to restart the car after this process is complete.
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