5200nAh Laptop Battery for Asus K42F K42J K42JA K42JB Laptop A32-K52 A42-K52 | eBay
Asus K52F-BBR5 Battery Replacement - iFixit Repair Guide
Synergy Digital Laptop Battery, Compatible with Asus U42JC Laptop, (Li-ion, 14.4V, 4400mAh) Ultra High Capacity, Replacement for Asus A31-U53, A32-U53, A41-U53, A42-U53 Battery - Walmart.com
Synergy Digital Laptop Battery, Compatible with Asus K52F-C2B Laptop, (Li-ion, 11.1V, 4400mAh) Ultra High Capacity, Replacement for Asus A31-B53 Battery - Walmart.com