Best Buy: DENAQ 6-Cell Lithium-Polymer Battery for Sony VAIO E Series SVS1512 and VAIO S Series SVS13 Laptops NM-BPS24
Amazon.com: RTC 2/V15H 15mAh 2.4v CMOS Battery for Sony VAIO VGN-FS/NR - VGN-NR350FE VGN-NS235J VGN-Z11XN VGN-SR390 VGN-240F - GRX C R F V Z A S Series BIOS CMOS Battery Ni-MH with
Sony Vaio VGN-FS640 Repair - iFixit
VGP-BPS39 Genuine Battery for Sony Vaio Tap 11 SVT11213CXB 7.5V 29Wh 3800mAh - WIT Computers