Jump a fully DEAD battery

Ryan1963 · 07-03-2023, 04:19 PM

I have an n52 3 series. How many amps do I need for a jumper box to charge and jump my dead battery? Car last started 9 months ago. Something that autozone, walmart, or harbor freight etc. would carry? Any help is appreciated.

NZE90 · 07-05-2023, 12:00 AM

You're wasting your time. The battery will be fucked after being discharged for so long due to a build up of sulfation on the plates inside the battery.

Permanent Sulfation
Permanent sulfation occurs when a battery has been in a low state of charge for weeks or months. While these can sometimes be salvaged, it is highly unlikely that restoration is possible.

Just buy a new one and move on.

07-03-2023, 04:19 PM	#1
Ryan1963 New Member 6 Rep 16 Posts Drives: 2007 328i e92 Join Date: Jul 2020 Location: Tijuana, Baja CA, Mexico iTrader: (0)	Jump a fully DEAD battery I have an n52 3 series. How many amps do I need for a jumper box to charge and jump my dead battery? Car last started 9 months ago. Something that autozone, walmart, or harbor freight etc. would carry? Any help is appreciated. Last edited by Ryan1963; 07-03-2023 at 04:46 PM..
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07-05-2023, 12:00 AM	#2
NZE90 Lieutenant 329 Rep 548 Posts Drives: 325i Join Date: Nov 2022 Location: Straya iTrader: (0)	You're wasting your time. The battery will be fucked after being discharged for so long due to a build up of sulfation on the plates inside the battery. Permanent Sulfation Permanent sulfation occurs when a battery has been in a low state of charge for weeks or months. While these can sometimes be salvaged, it is highly unlikely that restoration is possible. Just buy a new one and move on.
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