HP Compaq Presario CQ56-110US Battery Replacement - iFixit Repair Guide
Compaq Presario CQ40 Presario CQ40-305AU P 8800mAh Replacement Battery: BatteryClerk.com
Synergy Digital Laptop Battery, Compatible with Compaq Presario V4106AP-EE482PA Laptop, (Li-ion, 10.8V, 8800mAh) Ultra High Capacity, Replacement for HP HSTNN-DB10 Battery - Walmart.com