Compatible Parts Number for bp4v_99: PCGA-BP2V, PCGA-BP4V Specifications for bp4v_99 Li-ion 11.1 V and 8800mAh, 12-cell Condition: New Warranty: 12 Months with option of 3 years warranty for only $39.95 100% OEM compatible, Guaranteed to meet or exceed OEM specifications Color: Black Compatible Laptop Models for bp4v_99:Sony Vaio PCG-591L Sony Vaio PCG-V505 Sony Vaio PCG-V505 CTO Sony Vaio PCG-V505 series