KP Original 7.4V Lithium Ion Rechargeable Battery Compatible For Bluetooth Speaker Srs-XE300, Xb31, XB32, Xb33, ST06, RSXB31/LI (3000 Mah) Compatible with the Following Bluetooth Speaker Models: Sony src xb series and others.Battery Type: Premium Lithium-ion Battery, Voltage:7.4V, No memory effect. Can be charged or discharged as needed without loss of capacity. | Please double check the position of “+, -” before to order this battery. Please mind the direction of ‘ + ’red and ‘ – ‘ black wire when install the battery. If you are not sure about battery for your device please send us image with dimension