Synergy Digital Laptop Battery, Compatible with Asus K53SC Laptop, (Li-ion, 11.1V, 4400mAh) Ultra High Capacity, Replacement for Asus 07G016H31875M, 0B20-00X50AS, A31-K53, A32-K53 Battery - Walmart.com
Asus A53S/K53SV review: Asus A53S/K53SC - CNET
10.8v 5200mah 6cell Laptop Battery for ASUS A32-K53 A41-K53 K53 K53E;ASUS A54C K53SV X53U X54H X54C X53S X53 K53S X53E