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Old 02-02-2010, 07:11 PM   #1
Oyster
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e39 battery

FYI, I just picked up a new battery, perfect fit

From Walmart Energizer 108-h8 model for $113 + tax + $10 deposit for old battery exchange.

3 year free exchange and pro-rate after 3 years

Last edited by Oyster; 02-02-2010 at 07:13 PM.
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Old 02-03-2010, 08:49 AM   #2
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Does this battery have the air vent?
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Old 02-03-2010, 09:34 AM   #3
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Lightbulb Make this Thread a Sticky

Quote:
Originally Posted by Oyster View Post
FYI, I just picked up a new battery, perfect fit

From Walmart Energizer 108-h8 model for $113 + tax + $10 deposit for old battery exchange.

3 year free exchange and pro-rate after 3 years
Thanks for posting, E39s are developing the reputation as battery eaters.

Mr. Modirator, please consider making this thread a "sticky" where the Members can post the batteries and prices they paid.
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Old 02-03-2010, 11:05 AM   #4
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Quote:
Originally Posted by MLue1 View Post
Thanks for posting, E39s are developing the reputation as battery eaters.

Mr. Modirator, please consider making this thread a "sticky" where the Members can post the batteries and prices they paid.
so what happened to me was that last Saturday, I started the car in -25celcius. Car started fine. I turned on the heat, the defrost, the heated seat, the heated steering wheel.

Then I drove less than 1 km to mcdonald to get coffee and breakfast. The car would not restart after that.

I had CAA boost and did the test. Everything is fine and battery needs a recharge but still good.

I knew that I drained the battery 3 times (forgot lights or radio) and it is 2.5 years old.

So I made the decision to change it. CAA roadside did not have on in their trucks ($180-200 installed) and they failed to follow up with me next 2 days to come over and install one so I got fed up and started shopping around and stumble on 1 that fits.

Group 49 is for the e39. CAA usually carry the 650-750CCA and not the 900-950CCA

hope this helps
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Old 02-03-2010, 11:06 AM   #5
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Quote:
Originally Posted by BMVV View Post
Does this battery have the air vent?
I don't know but it looks like the previous one and the air vent is inside the rear fender.
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Old 02-05-2010, 02:08 PM   #6
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You should really connect the air vent tube to the new battery. The gas emitted is not only harmful, but potentially flammable. If there are 2 vent openings (most aftermarket batteries have 2) you could seal the one closer to the negative terminal, or run tubes from either vent and do a "T" to merge them into the single vent tube which runs to the outside fo the body.
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Old 02-05-2010, 02:12 PM   #7
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Quote:
Originally Posted by richmak View Post
You should really connect the air vent tube to the new battery. The gas emitted is not only harmful, but potentially flammable. If there are 2 vent openings (most aftermarket batteries have 2) you could seal the one closer to the negative terminal, or run tubes from either vent and do a "T" to merge them into the single vent tube which runs to the outside fo the body.
can you take a picture of your ventilation?

Thanks
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Old 05-03-2010, 12:18 PM   #8
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I just pulled the battery out of my 00/540i. OE BMW battery and there were no vent tubes. My 01/330i has a tube, but not the 540. I tried charging the battery, but no luck. Hope to get it tested today and get a replacement. I've never had a battery just die like that.
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Old 05-04-2010, 12:55 PM   #9
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I just pulled the battery out of my 00/540i. OE BMW battery and there were no vent tubes. My 01/330i has a tube, but not the 540. I tried charging the battery, but no luck. Hope to get it tested today and get a replacement. I've never had a battery just die like that.
I was wrong...when reinstalling the battery, I found that there is a vent tube that was never connected to the battery. Sadly, this battery was purchased and installed at Parkview BMW by the previous owner. Luckily I found an L connector and hooked everything up correctly. Still need to get the battery tested - it did charge overnight (wouldn't charge when I tried the day before), but the bubble indicator is not green (charger light was green this morning), but voltage was 13+ and 14 when I started the car.

My next task is to figure out how the battery drained over the course of one day. I parked the car in the garage and forgot to lock the driver's door. Could that have drained the battery?
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Old 05-04-2010, 07:33 PM   #10
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If there was a light on.

I kow my kids love playing with the reading lamps on the C pillars. The only way I notice is that the garage gets pretty dark with all the doors closed.
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Old 05-04-2010, 09:58 PM   #11
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The FSU which controls the interior fan may be the cause, do a search you can replace it your self with a bit of effort. The FSU is the number one killer of E39 batteries... .
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Old 12-05-2011, 09:44 AM   #12
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bumping this old beauty.

What are people replacing the old batteries with nowadays Interstate has one and i think costco also has a e39 battery available.
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Old 12-05-2011, 11:32 PM   #13
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I know a couple of E38 guys who have reported good things about the big Eliminator battery from Canadian Tire. Put it this way with more electronics on the E38, that battery will have no problem runing the E39.
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Old 01-10-2012, 12:46 AM   #14
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I just replaced with a NAPA Euro/Import battery, same form factor as OEM and with vent in the right place, somewhat pricey based on Costco etc at $179+taxes. The PO had the same battery in there for about 4 years before it developed a bad cell.
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