CP1254 Varta A3 3.7V 60 mAH for Bluetooth Headset Rechargeable Wearable Battery
CP1254 (A3). Keep the battery away from fire. Never make the circuit short or squeeze the battery. Battery Capacity: 60mAh. Battery Capacity: 4000mAh. for the SONY WF-XB700, WF-SP700N, WF-SP900, WF-1000XM3 wireless earphones.