NinjaBatt Laptop Battery for HP HSTNN-LB42 HSTNN-C17C HSTNN-Q21C HSTNN-W20C HSTNN-DB42 HSTNN-IB31 HSTNN-IB46 HSTNN-IB42 HSTNN-W34C HSTNN-OB42 HSTNN-DB46 HSTNN-OB31 HSTNN-Q33C [6 Cells/4400mAh/48wh] 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. SAFETY FIRST: Dont fall into buying cheap and unsafe batteries, our batteries are UL/CE-/FCC-/RoHS certified for safety and packed with a variety of safety features, including short circuit, overheat, and overload protections. HIGH QUALITY COMPONENTS: Our Laptop batteries are assembled from top quality material and circuit boards to ensure durability and performance, our batteries are equipped with grade A battery cells that provide up to 500 charging cycles. 12-MONTH WARRANTY AVAILABLE ON ALL LAPTOP BATTERIES: Were so confident in the performance of our replacement laptop batteries that were including a 12-month warranty with every single purchase. Reliable performance Extended battery life Safe use anytime, anywhere