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BIOS battery GC02000V200 - GC02000V200 for HP Elitebook 8540w
HP EliteBook 8540W Laptop Battery 5200mAh 14.4V
8 Cell Battery for HP EliteBook 8530p 8540w 8730p 8730w 8740w 493976-001 KU533AA | eBay
Laptop Battery for HP EliteBook 8530P 8530W 8540P 8540W 8730W 8740W 493976-001 HSTNN-LB60 HSTNN-OB60 HSTNN-XB60 KU533AA 501114-001 - Walmart.com