HP Pavilion DV3-2000 series, DV3-2100 series, series, CQ35-400 series, CQ36, CQ36-100 series
1. 10.8V and 11.1V are compatible, they are in common use. 2. The 4000mAh(6 Cells) battery will extend out about 1 inch from the bottom of the laptop, bigger size but lasting longer. 3. These batteries are not compatible with HP Pavilion DV3-1000, DV3-4000 Series laptops. This brand new 9 cells ( 6600mAh, 10.8V ) replacement HP RT06 battery is made with high quality battery cells from Sanyo, 100% compatible with your HP RT06 laptop. Our batteries are meet or exceed the original equipment manufacturer specifications( voltage, capacity, safety and compatibility ), all of them have passed international certification( CE, UL, ROHS, ISO9001/9002 etc.), strict quality and safety testing( QA & QC) before leaving the manufacturer. And the battery shell was made of high quality environmentally friendly and fire-resistant materials. These batteries also have internal circuit boards with smart chips, which allows the RT06 battery to communicate with the laptop to monitor battery temperature, performance and output voltage.