Synergy Digital Laptop Battery, Compatible with Asus X77JO Laptop, (Li-ion, 11.1V, 4400mAh) Ultra High Capacity, Replacement for Asus 70-NX01B1000Z, 70-NXH1B1000Z, 70-NZY1B1000Z Battery - Walmart.com
JOLEGE 14.4V 2200mAh HP laptop Battery Replacement for HP 510 HP 530 440264-ABC - Walmart.com
3 Ways to Maximize HP Laptop Battery Life - wikiHow