Questions about Insta360 Battery ONE X2

I ordered two of these batteries in February, but the delivery date keeps getting pushed back. First it was April and now it says early June. Can I expect it to arrive at any time?

There are two batteries on offer on Digitec, one costs 1.50.- more, are there differences or a reason for this?

I urgently need 2 batteries for the holidays, but you can't even order them anymore. Cameras are sold, but if you need an extra battery, it's never available. What are you supposed to do with a camera that no longer has power during the holidays???????

Does the battery also fit in the Insta360 One X2?