I can not find the 4 batteries that are in the brace. How do I get replacements?
you asked this question about ten months ago and no-one has answered.
This may be due to the fact that the question is a little strange for most people here.
The simple answer to your question is that there are no batteries in the x-brace.
I think that you may be confusing batteries with magnets as the x-brace does have 4 magnets which are required for its function of holding the TWA in place when in use.
I hope that this has helped to solve any confusion which may have arisen on your part.
That aside, I hope you're enjoying the TWA as much as I am.