Crappy LPT : Use this trick to get a new BTR5 near the end of your warranty to new unit with a fresh battery. If you live in a region with official support.Anything can break. And when it happens to us it is natural to draw the conclusion it is a common problem and can happen again to us. In reality, most of the time that person was just incredibly unlucky - if something is going to break, even if only one in all of existence is going to break, that one person is going to be impacted and maybe draw a larger conclusion.
Research this. If it truly is a widespread problem - MANY failures - then hard pass on the replacement. Otherwise, if you really liked the product, take the replacement. My opinion, only.
To be honest though, I'm too scared to use the EQ function on this DAC. There's an example even on this thread.