4.4.4 OTA update for ATT pushing out, larger mysterious update didn't install (5?) topic

I unexpectedly got a nice surprise this morning with a hefty 400mb update via ATT Update Server OTA. It was 4.4.4, not 5 as hoped but at least it's something.

4.4.4
Baseband: G900AUCU2A01
Kernal: 3.4.0-3116194
Build: KTu84P.G900AUCU2AOA1

The strange thing is after the update, I got an notice that it updated successfully, it said a software update was available again. Downloaded it, and it was almost 500MB but then said there wasn't room to install it. I cleared a bunch of photos and file and then the cache and when I went back, continue update was grayed out. I'm thinking I managed to delete it when I cleared the cache. Wonder if that was Lollipop. Did the date trick and checked update again and said up to date. So who knows, but there was nothing in the FOTA folder.

I called ATT and they were not even aware that it 4.4.4 was being pushed out OTA yet. Said that only 4.4.2 was the most recent, and of course knew nothing about when 5 would be out.

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[Q] What Larger Replacement Batteries Are Available? topic

I recently read about the Hyperion battery which basically allows you to swap your existing battery for an 8000 mAh battery, and comes with a different case. I think the stock battery is something like 3250mAh.

What other batteries are out for the Galaxy Note 4 and in what capacities? I'm not asking for charging boxes. Secondly, are there any cases available to fit these larger battery packs?