CWK New Replacement Laptop Notebook Battery for Sony VAIO VGN-SR420D/B VGN-SR420D/H VGN-SR420J VGN-SR420J/B 4400mAh PCG-81115L PCG-81214L PCG-81312L PCG-8131L PCG-5N2L PCG-5N4L PCG-5P2L PCG-5P4L Condition: Brand New - Grade A cells Battery Type: Li-ion Voltage: 11.1 Volt (10.8 Volt compatible) Capacity: 5200mAh (Better than 4400mAh) 90 Day Money Back. Buy with confidence!