[smosh]

maybe a silly question, but i have not been able to find an answer -

if you simply replace the battery, not registering,etc., will the car start and run...just not charge properly?

I need to replace the battery today, but getting the cable would be a few days away.

[gjm120]

Yes, unless there is something else wrong.

In case you haven't found much, good info on battery replacement is here-

https://www.1addicts.com/forums/show....php?t=1338304

[arkie6]

Originally Posted by smosh

maybe a silly question, but i have not been able to find an answer -

if you simply replace the battery, not registering,etc., will the car start and run...just not charge properly?

I need to replace the battery today, but getting the cable would be a few days away.

Yes, it will start and run just fine. Charging is fine also. I replaced my battery over 2 years ago with a Wal-Mart battery and didn't register it (wasn't aware of that at the time). I've monitored charging system voltage since then and everything appears to be completely normal.

[jwh335i]

Originally Posted by arkie6

Yes, it will start and run just fine. Charging is fine also. I replaced my battery over 2 years ago with a Wal-Mart battery and didn't register it (wasn't aware of that at the time). I've monitored charging system voltage since then and everything appears to be completely normal.

My experience exactly except that I knew about the registration procedure but was too lazy to bother with it since the Autozone battery I put in had a good warranty. Two years plus later, no problems whatsoever despite the non-registration.

[d3drturner]

my data point:
maxx H8 from walmart lasted lasted 2 years 3 months
registered with rheingold

[Sgop335]

Originally Posted by d3drturner

my data point:
maxx H8 from walmart lasted lasted 2 years 3 months
registered with rheingold

What was the oem AH?

[Casca]

Just replaced my battery again. First time I went OEM from dealership for @$225 I think. This time went with the Walmart H8 battery. Found two formulas to figure out amp hours.

RC=reserve capacity


RC/2+16=AH

140/2+16=86AH


OR


RCx0.6=AH

140x0.6=84AH


I am going with 85AH if that is an option.


I think this stuff is based on temperatures anyway and what they are assuming with figuring out all of this is based on the temperature being 85f (?).

[arkie6]

Battery capacity ratings are typically based on a design temperature of 25 deg C (77 deg F). Lower temperatures = lower capacity. Higher temperatures = higher capacity, but also shorter life.

[BOB4BMW]

thank you for the information here. I am new to e90, and so far i miss the simpler days....too many computers

[silverseal99]

"I am going with 85AH if that is an option."

Casca, Appendix B in NCS Expert only offers options for 80 and 90 AH AGM batteries. I tried a manual ADD for my 95 AH AGM battery but it wouldn't accept it.

[Meeni]

Still running strong, closing on 7 years now.

[trader14]

this is my following comment - well done!

[2002]

Saw in Walmart the other day that they now has an H8 AGM, with 5 year free replacement. In my area it is $149.76! I think I'll try if my H8-MAXX takes a dump.