Battery for HP hstnn db72, 10.8 11.1V, 4400 5200mAh|Laptop Batteries| - AliExpress
Amazon.com: Extended Battery for HP Compaq Presario CQ40 CQ45 CQ50 CQ60 CQ70 Series KS524AA EV06055 HSTNN-CB72 HSTNN-CB73 HSTNN-DB72 HSTNN-DB73 HSTNN-IB72 [8800mAh/95Wh] : Electronics
Synergy Digital Laptop Battery, Compatible with HP HSTNN-DB72 Laptop, (Li-ion, 10.8V, 8800mAh) Ultra High Capacity, Replacement for HP HSTNN-CB72 Battery - Walmart.com