This is a Brand New Replacement Battery for SONY SR Series Repalcement for Sony VAIO PCG-SR Series BATTERY PCGA-BP2S / PCGA-BP2SA. Compaq Part Numbers: PCGA-BP2S, PCGA-BP2SA, PCGA-BP2S/HI. For Sony Vaio PCG-SR Series: Vaio PCG-SR, Vaio PCG-SR11K, Vaio PCG-SR17, Vaio PCG-SR17K, Vaio PCG-SR1K, Vaio PCG-SR21K, Vaio PCG-SR27K, Vaio PCG-SR31K, Vaio PCG-SR33, Vaio PCG-SR5K, Vaio PCG-SR7K, Vaio PCG-SR9...