for SONY WF-1000XM4 Battery - ZeniPower Z55H 3.85V ( 2 X Batteries) 1000XM4
Keep the battery away from fire. Never make the circuit short or squeeze the battery. SONY WF1000XM4 WF-SP900 Headphones. Battery Capacity: 70mAh. Battery Capacity: 4000mAh. We are always here ready for help.