Do some more research on the Werker AGM batteries (private brand supplier of AGM batteries to BatteriesPlus) ...

BatteriesPlus just announced that they are transitioning AWAY from that supplier. There must be a reason. They may now offer that Werker AGM at an attractive discount.

They're switching to Duracell Ultra AGM. I would insist on one of those.

The AGM technology is constantly evolving ... the latest and greatest is usually the best.

Often the full name of an AGM battery is a Valve Regulated Lead Acid Absorbed Glass Mat - VRLA-AGM. The regulating valve is the case pressure relief valve that relieves excess case pressure out the vent tube.

Thank you for that post. Battery was include tax and coupon $190.

Now the best part, this battery is identical to the OEM BMW battery in my 2011 35d X5.

No registration was required, plug & play. :thumbup:

Edit: I read core charge? I have the old battery sitting in my garage.

you're welcome and glad it helped! yeah there should be a core charge you can get refunded when you bring the old battery back to the store

Technically even the precise same battery requires 'registration'

Registration is resetting the charging adaptation algorithm to tell the car "this is a new battery- start from time T=0"

+1

Without registration of a new battery with higher capacity than the old battery, the IBS/charging system will leave the headroom appropriate to not overcharging your OLD battery.

The BMW charging system will not fully charge its battery to avoid the risk of damage due to overcharging. The technical data available to me/us does not specify how much capacity headroom is reserved.

Anyone try the Exide batteries from Home Depot? Edge L5/49/H8 Auto AGM Battery-FP-AGML5/49DS - The Home Depot

This is very similar to the OEM one and I read that Exide makes the OEM batteries for BMW. Price is similar to the other brands at Advance Auto Parts and Auto Zone without coupons.

I wanted to directly address the issue raised by some about not registering / coding their batteries, and the explanation stated here which several posters seem to have missed or ignored.... Because I had the same thought at first but am second-guessing myself now...

At first I did the math...
If the dealer is charging $200-$300 to "register" the battery, and that makes the battery last 20% longer [say 5 years instead of 4 yrs], it would be more economical to NOT pay to have it registered if you just need replace your battery at 4 yrs instead of 5. (since 20% of new battery cost is less than the Register fee)

HOWEVER at least two posters have called out the additional risk of having your electronics potentially incur damage, and other various problems down the road by choosing NOT to register the battery. Just because you didn't register, and its been fine for 4 years, doesn't mean you are not at risk. I would argue that now after 4 years will be exactly WHEN you MIGHT start to see issues.
Or not; who knows. You take your chances.

Same thing goes for Coding your car for a diff type / capacity battery. Double in fact.

So the best route would seem to be to DO the registration (& coding if needed) but finding an indy shop that can do it cheaper than dealer.

All that said, I guess it due to the mysterious sound of "some electronics may incur damage" that most folks dismiss it out of hand. Would be nice to have something a bit more concrete.

you can easily do it on your own, plenty of DIY write-ups around. i'd always choose a wired connection instead of bluetooth or wifi, if/when your wireless connection goes bad while writing "some electronics *will* incur damage". there's a reason why the guys who do it for a living plug in instead of using some fancy smartphone app.

Just wanted to thank everyone for the information here.

I specifically registered to let everyone know of another option (maybe already listed and I missed) at Advance Auto
AutoCraft Platinum AGM Battery, Group Size H8, 900 CCA H8-AGM: Advance Auto Parts
$185.99
"AutoCraft Platinum AGM Battery, Group Size H8, 900 CCA"

Questions/Answers section does say its 92AH

When you're on the site it pops up with a 20% off coupon (have to give them an email address, if you're on gmail just use [email protected])


Now to find the coding software and get the correct cable for an 09 e70 3.0i

Thanks again for all the info!