Questions for ZX300 owners

Hello!

Lately, I have been scouring the internet to find the best DAP solution for me. At a glance, the ZX300 is perfect for me for a few reasons:

- I don’t want streaming/Android

- Great build and physical buttons

- Reputable manufacturer

- Neutral sound and low noise floor

- Primarily driving Top Pro IEMs and occasionally Sundaras

- Supports 2TB SD

That leaves the big question - battery health.

Obviously, with an older device, you can expect degradation of the lithium battery. I have seen New and like-New units in the Japanese market online.

For folks who have had these for a few years, how many hours of battery life do you get still? Should I expect a significant battery improvement in a new unit over a like-new preowned unit?

Thank you all for your help!