6600mah 9 Cells Laptop Battery For Hp Probook 4540s 4545s Hstnn-db2r Hstnn-i02c Hstnn-i97c-3 Hstnn-i97c-4 Hstnn-i98c-5 - Laptop Batteries - AliExpress
HP Probook 4540s - Replacement Laptop Battery 9 Cell
Synergy Digital Laptop Battery, Compatible with HP ProBook 4540s Laptop, (Li-ion, 11.1V, 6600mAh) Ultra High Capacity, Replacement for HP PR06 Battery - Walmart.com
AKKU 53637: Laptop battery for HP, Li-Ion, 5200 mAh at reichelt elektronik
HP ProBook 4540 4540s 4545s Battery PR06 QK646AA 633805-001