11.1V Battery for HP Probook 4530S 4540S 4440S 4430S 4545S 4535S PR09 5200mAh US | eBay
Synergy Digital Laptop Battery, Compatible with HP ProBook 4540s Laptop, (Li-ion, 11.1V, 4400mAh) Ultra High Capacity, Replacement for HP PR06 Battery - Walmart.com
Hp ProBook 4540s 10.8V 47Wh 6 cell Replacement Laptop Battery
PR06 Battery for HP ProBook 4430S 4440S 4540S 4530S 4545S 633805-001 QK646AA QK646UT - WIT Computers
Dr. Battery Advanced Pro Series HP ProBook 4540s LHP251-AP 5200mAh / 56Wh Notebook Battery - BattDepot United States
HP ProBook 4540 4540s 4545s Battery PR06 QK646AA 633805-001
How to disassemble HP ProBook 4540s – Inside my laptop
Battery suitable for HP ProBook 4540s - 6600 mAh 11.1 V battery (Black) - BatteryUpgrade
Battery for HP ProBook 4540s, ProBook 4530s, ProBook 4535s, ProBook 4545s, ProBook 4740s - PR06, HSTNN-LB2R,