PREMIUM QUALITY REPLACEMENT NOTEBOOK BATTERY: Bring your laptop back to life with Ninjabatt's high quality laptop battery - Made of high quality materials, top grade battery cells and packed with safety features. TRUE CHARGING CAPACITY THAT LASTS: Every one of our replacement notebook batteries are tested to meet OEM specifications. Our 6 cells Li-ion battery is rated at 48wH/4400mAh/10.8V - true charge capacity that wont let you or your laptop down. COMPATIBLE MODELS: Compaq 1000 2000 430 431 435 450 455 436 630 631 635 650 655 Envy 17 Series 17-1000 17-1200 17-2000 17-2100 17-2200 17-3000 17-3200 17T Pavilion DM4 DM4-1000 DM4-2000 DM4-3000 DM4T DV3-4000 DV3-4100 DV3-4200 DV3-4300 DV4-4000 DV4-4100 DV4-4200 DV4T-4000 DV5-2000 DV5-3000 DV5T-2000 Presario CQ32 CQ42 CQ43 CQ52 CQ62 SAFETY FIRST: Dont fall into buying cheap and unsafe batteries, our HP batteries are certified for safety and packed wi