2PCS ZeniPower 1254 Z55H 3.85V Battery for Sony WF-1000XM4 Bluetooth Headset
For SONY WF1000XM4 WF-SP900 Headphones. Battery Type: Li-ion. 1.Li-Ion Laptop Battery 10.8V and 11.1V are in common use. 2.Li-Ion Laptop Battery 14.4V and 14.8V are in common use. Capacity: 70MAH.