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
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High Quality HP ProBook 450 G0 Replacement Battery | Laptop Battery Direct
Spare Laptop Battery for HP ProBook 440 445 450 455 470 G0 G1 Series FP06 FP09 | eBay
HP ProBook 450 G4 Battery Replacement - iFixit Repair Guide