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
36wh Vgp-bps41 Battery Sony 13 Svf13n Svf13n13cxb Series Pc - AliExpress
Sony Vaio PCG-71912L Battery
Amazon.com: Etechpower Replacement Battery for Sony VAIO PCG-3J1L PCG-41112L PCG-51211L PCG-51311L PCG-51312L PCG-7171L VGP-BPS13, VGP-BPS13/B, VGP-BPS13/Q, VGP-BPS13A : Electronics
UPDATE: Important Notification for VGP-BPS26 Battery Packs in VAIO Personal Computers - November 24, 2016 | Sony UK
Best Buy: DENAQ 6-Cell Lithium-Polymer Battery for Sony VAIO E Series SVS1512 and VAIO S Series SVS13 Laptops NM-BPS24