Replacement BTI battery for RAZOR BLADE 15 2018 RZ09-02386E91 RZ09-02386E91-R3U1 RZ09-02385W71-R3W1 RZ09-02385E92-R3U1 RZ09-02486, RZ09-02886 RZ09-02887 RZ09-02888 RZ09-02887E92-R3B1 RZ09-0301 RZ09-03017 RZ09-03018 4-cell 15.4V 5209mAh Li-Ion