Our HP Pavilion dv7-3080us laptop needs to have the RTC battery replaced. RTC = Real Time Clock, I learned. (They used to be called CMOS battery, BIOS battery, or on Macs PRAM battery) because it is losing all its Control Panel settings. Anyway HP wants $43.00 for what is called a "CR2032 style" battery. A vanilla CR2032 down at the hardware store costs $2.00. What am I getting for an extra $41.00?