They provided me with a prepaid DHL shipping label so I only had to schedule a pickup. They didn't send me any details about the problem; they just shipped a new device. Before receiving the label, I recorded a video which clearly showed the issue.
Thanks for sharing at least they handled it. I was actually curious about what companies will do when they have shipped a defective device. Probably they are doing some routine failure analysis on the shipped device or something. I haven't tried any Trezor device yet.
However, problems like this should not happen, and it is to be assumed that Ledger installed a certain percentage of defective batteries in the model X. If we know that most of the components are made in China (the body of the device), then the battery is probably "made in China" also.
Because it's cheaper to let it be assembled there. I don't know about these days though with all that's happening. Probably a lot of manufacturing delays or something.
Even without any defects or issues the lifespan of the Nano X's battery is probably 5, maybe 7 years tops. I don't know if Ledger plans on having a service available to replace the battery, or everybody might be better off if they just offer a discount to those who's battery has served it's purpose. Like Lucius alluded, however, the device can still be used long after the battery dies, just by plugging into a computer or a power source.
Probably a discount would be favorable or probably send in a new device just pay for the shipping, lol.