Battery for laptop ASUS VivoBook 5pins X505 series / B31N1631 11.52V 42Wh / 3727mAh
Synergy Digital Laptop Battery, Compatible with Asus VivoBook S15 S510UN-BR128 Laptop, (Li-Pol, 11.52V, 3600mAh) Ultra High Capacity, Replacement for Asus B31Bi2H Battery - Walmart.com
Asus VivoBook FL8000U LAS341 4400mAh / 34Wh Notebook Battery - BattDepot United States