It is designed for use in the Sony WF1000XM4 Bluetooth headset.
Centerpower IPC ZeniPower Z55H Replacement Battery for WF1000XM4 XM3 WF-SP900 Bluetooth Headset Battery
2PCS ZeniPower Z55H 3.85V Battery + tools for Sony WF-1000XM4 Bluetooth Headset
Single ZeniPower Z55H Bluetooth Headset Battery 3.85V for Sony WF-1000-XM4
Genuine 2x ZeniPower Z55H 3.85V 270mwh SONY WF-1000XM4 Batteries
Sony WF-1000XM4 Earbud Zenipower Z55H Battery – Replacement Internal Cells (2x)
SONY WF-1000XM4 Battery - ZeniPower Z55H 3.85V 75mAh
