Are there different types of battery for FP1/U

The battery from my FP1/U is swelling. Now I’m looking for a new one. I would like to know, if I can use every battery that says FP1/U or are there diferent types.

Batteries for the FP1 and the FP1U are interchangeable (there is/was only one battery for both), but they are all sold out. At your own risk, you may try one of these:

The battery manufacturer has changed once but, still, the two types are interchangeable.

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Thank you for your reply.

Thank you too, so I can try to buy some used battery.