I’ve never found release notes for I-levels, only notes for the ISTA software itself.
For example: https://mechatronicautosolutions.com/wp-content/uploads/2024/06/ISTA_-Release-Notes-Programming-Car-4.47.3x-ISTA_P-3.72.0.pdf
I001-24-07- was just released, not sure what changed since I’m still on I001-24-03.
My previous version was 22-11 and the only things updated were the headunit (programming and coding) and the LIM (coding only). It makes sense the headunit would get updated frequently since Idrive 6 is used...
Bought mine a couple months ago at Battery Warehouse Online https://www.batterywarehouseonline.com/aux18l/
Identical to the BMW battery, made by the same OEM (Deka/East Penn Manufacturing).
Free shipping and no tax, $149.99.
I don't think the Black Friday Connected Drive deals included the US, they were always Europe. I could be wrong, but googling over the past few years has shown it's European/Japan only.