No the BPS is larger, we're designing a mini BPS, also aimed to launch in May, but that would need to be twice as large. It could be the same width+height but twice as deep, we're currently trying to fit the BMS to fit on a PCB making this possible.
The BPS for the Extreme is much larger, it will need a large amount of cells to be able to get a workable amount on playing time (charge once every 24 hours). We are working on 3 scenarios for this:
1) An internal BPS in the existing current chassis.
2) An internal BPS in a new chassis matching the new Switch and Router looks, this chassis would be slightly larger and considerable heavier then the current Extreme and comes with, imho, improved looks. Of course you can exchange your current chassis under the same upgrade value protection plan. This new chassis will be much easier for us to manufacture and assemble.
3) An external BPS to power your current Extreme externally.
Meaning we'll have a myriad of options to choose, which is actually not problematic for us as we can manufacture all of it in house.