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Please help me out--

2 weeks back 12v battery died. I have jump started it and left the car running for 45min and everything went normal. After 3 days of it, i am seeing Low Battery Warning sign and once i start the car, sign goes off and i can drive it .But Low Battery Warning sign keeps on coming. I guess the battery is not holding it . Please let me know if i need to change battery, Which one i have to buy? how to replace it? Does it locks the HV system or any other while replacing 12v battery?
 

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Please help me out--

2 weeks back 12v battery died. I have jump started it and left the car running for 45min and everything went normal. After 3 days of it, i am seeing Low Battery Warning sign and once i start the car, sign goes off and i can drive it .But Low Battery Warning sign keeps on coming. I guess the battery is not holding it . Please let me know if i need to change battery, Which one i have to buy? how to replace it? Does it locks the HV system or any other while replacing 12v battery?

@Kanna, check out this thread.
 

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Precautionary Change of OEM 12V Battery

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The max voltage of my original 12v battery had dropped into the yellow zone so I had Pat's Garage replace it during a recent annual service.

If I had allowed it to drop into the red zone, I may have found myself locked out on a cold, dark and rainy night.

With my new battery, the voltage reads 12.7v, so it's safely at the top of the chart at 100% SOC.

I'm concerned that the Karma's red warning light may be too late, because you can't just pull up to Sears or O'Reilly and simply switch the battery in the parking lot.

Although I never got that light, my periodic measurements were showing that the original battery was heading south, so I requested the precautionary change mentioned above.

It would be nice to have the actual 12v battery output displayed prominently on the panel or in the Systems Monitoring screen part of the CIU. Meanwhile, checking your 12v battery output in the engine compartment or using an OBDII scanner with a 12v readout, should be on your Karma to-do list, especially if you've never changed the original.

It's better to be safe than soggy.
 
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