Amazon.com: Synergy Digital CMOS/BIOS Battery, Compatible with Sony VAIO PCG-FR415B CMOS/BIOS, (Ni-MH, 2.4V, 20 mAh) Ultra High Capacity, Replacement for Sony 2/V15H Battery : Electronics
Sony VAIO PCG-3E2L BIOS Battery Replacement - iFixit Repair Guide
40WH BPS35 Battery for Sony Vaio 14E 15E Series VGP-BPS35 VGP-BPS35A 14.8V - Walmart.com