Why BMW's twin-turbo V8 needs a new battery with every oil change

[BGM]

One of the reasons I went with the naturally-aspirated V8--lack of real life testing/usage on the turbo.

Why BMW's twin-turbo V8 needs a new battery with every oil change

[Pierce330]

That is actually ridiculous...

[TiAgX5]

Simple fix, Li-Ion.

Li-Ion can be drained dead, left in the discharged state for months, and will charge back up to 100% capacity.

MB has been using them for a few years now.

Had I not found a Bosch max RC/CCA battery for just over $100, I would have LI-Ion in the E53.

[bawareca]

Here is my reply to the blog:

More than 20 million vehicles were recalled in the US last year alone. I can live with the expense of a new battery every few years, but I cannot live with a car that is trying to kill me. Come on guys, after millions of faulty and downright dangerous airbags and other important parts in the cars that actually kill people you are whining for a battery replacement every 10 k miles?! Which BMW is doing voluntarily, but is probably required in 10-30 % of all cars only. And no one commented on this part of the article:
“Rather than waiting for them to break, BMW NA is proactively replacing the parts with improved components through its shrewdly named Customer Care Package, or CCP. This is not a recall, because recalls address vehicle safety. Instead, BMW says, the CCP represents its “commitment to the long-term reliability of our most technologically advanced products.” It is undeniably a good customer service move.”

[BGM]

I wonder if BMW replaces the battery after you are out of warranty for the lifetime of the car?

[Doug Huffman]

Originally Posted by TiAgX5

Simple fix, Li-Ion. Li-Ion can be drained dead, left in the discharged state for months, and will charge back up to 100% capacity. MB has been using them for a few years now.

Had I not found a Bosch max RC/CCA battery for just over $100, I would have LI-Ion in the E53.

That's not likely the issue. The lifespans of LiPo and AGM are about the same. On point, 300 - 500 equivalent rated charge/discharge cycles.

See BatteryUniversity.com.

[TiAgX5]

Originally Posted by Doug Huffman

That's not likely the issue. The lifespans of LiPo and AGM are about the same. On point, 300 - 500 equivalent rated charge/discharge cycles.

See BatteryUniversity.com.

From what I understand, Li-Ion can withstand over 2000 charge/discharge cycles.

[ninja_zx11]

Originally Posted by TiAgX5

Simple fix, Li-Ion.

Li-Ion can be drained dead, left in the discharged state for months, and will charge back up to 100% capacity.

MB has been using them for a few years now.

Had I not found a Bosch max RC/CCA battery for just over $100, I would have LI-Ion in the E53.

I don't think lipo batteries can be drained dead.They need to have some minimum cell voltage of approx 2.7~2.8.

[TiAgX5]

Originally Posted by ninja_zx11

I don't think lipo batteries can be drained dead.They need to have some minimum cell voltage of approx 2.7~2.8.

Dead may have been a bad word, discharged below a voltage where the vehicle will function is better.

Li-ion can be discharged down to a voltage that will destroy AGM and lead acid units (deep cycle units included).

[Doug Huffman]

Originally Posted by TiAgX5

From what I understand, Li-Ion can withstand over 2000 charge/discharge cycles.

See Table 2, Cycle life as a function of depth of discharge. How to Prolong Lithium-based Batteries - Battery University