Genuine 4200mAh FP06 Laptop Battery for HP ProBook 440 450 G0 455 G1 708458-001 - Newegg.com
Synergy Digital Laptop Battery, Compatible with HP ProBook 450 G1 Laptop, (Li-ion, 10.8V, 4400mAh) Ultra High Capacity, Replacement for HP FP06 Battery - Walmart.com