Dead factory battery replaced with Costco Battery Interstate/#27 Ls460
07-24-17, 06:59 PM
#31
A8 long wheel base. Mine is the 2nd largest in the A8's. Was not worth spending an extra $100 for a bit more reserve on the biggest... lolThe big batteries are mainly for the auto stop start system I believe. Lots of reserve to power the systems with the engine off.
07-24-17, 07:52 PM
#32
Racer
I would not pay for labor. The LS does not have a charging management system so nothing needs to be reset. I paid $230 for my battery and installed myself. Most good AGM's go for about $200 - $250 for the battery. For lead acid I would not spend more then $120.
As far as size, often the OEM will vary in size based on options for the car. Quick search also came up with BCI group 27.
As far as size, often the OEM will vary in size based on options for the car. Quick search also came up with BCI group 27.
07-25-17, 06:57 AM
#33
Advanced
If an AGM costs twice as much as a regular battery, does it last twice as long? If not, then wouldn't it be more cost effective to buy two regular batteries over time? Just curious because I do not have experience with AGM batteries. Wish I could have found a Panasonic to go back in under the hood. I went with a Duralast Gold because I saw good experiences posted on the forum (and because Costco didn't stock my size at any of the three local locations). It has a 5 year warranty (3 year free replacement) for $120.
I always replace batteries when they get into the 4-5 year age because I don't need a dead battery and end up stranded..... Cheap insurance on a job that is easy to DIY.
07-25-17, 10:00 AM
#34
The extra reserve is what applies to my situation vs longevity. They do not last twice as long but they do tend to last longer.
There are a few distinct advantages of an absorbed glass-mat battery versus a lead-acid battery:
- An AGM battery has a lower internal resistance than a flooded lead-acid battery, which allows faster recharge.
- The AGM battery doesn't produce nor expel hydrogen/oxygen gasses like the flooded lead-acid battery. Therefore, it doesn't have any electrolyte or water loss.
- When comparing the same group size battery, AGM batteries allow additional plate surface area. More plate surface area = high ratings in cold cranking amps (CCA) and/or reserve capacity (RC).
- AGM batteries do not exhibit terminal corrosion. No corrosion means less battery maintenance.
07-25-17, 10:05 AM
#35
Racer
Thank you, Lexuslsguy. That is interesting to know. Is it still common to have to add water to batteries? I don't think I've ever added water to a car battery ever since I began driving 22 years ago and honestly I never checked. Maybe I should have but by the time each battery needed replacing it was already 4+ years old and doubtful if some water would have made a difference.
07-25-17, 11:16 AM
#36
Thank you, Lexuslsguy. That is interesting to know. Is it still common to have to add water to batteries? I don't think I've ever added water to a car battery ever since I began driving 22 years ago and honestly I never checked. Maybe I should have but by the time each battery needed replacing it was already 4+ years old and doubtful if some water would have made a difference.
07-25-17, 11:29 AM
#37
About a year ago, we had a spirited discussion on battery replacement. For those of you who have a keen interest in this subject, that thread might be interesting reading.
https://www.clublexus.com/forums/ls-...w-battery.html
https://www.clublexus.com/forums/ls-...w-battery.html
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