The Z30, Z50, and Zfc use EN-EL25 batteries. These batteries were in short supply when they first appeared in October 2019, but seem to be easily obtainable today. Third party batteries have also appeared, as well:
- Reytric
- BM Premium
- Kastar (verified working, thus the one I'll link to at the moment)
- Zthy
Third-party chargers for the EN-EL25 also exist:
- Kastar EN-EL25 AC dual battery charger
- Kaster EN-EL25 USB dual battery charger
- Kaster EN-EL25 AC single battery charger
If you're looking for a "dummy battery" for use with AC power, ones have finally appeared from a third party, the F1TP EP-5G and the AliExpress combo. The Glorich version appears to be available from Amazon, but for more money.
The above are Amazon links. As an Amazon Associate I earn from qualifying purchases.