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 49wH/4400mAh/11.1V - true charge capacity that won’t let you or your laptop down. SAFETY FIRST: Don’t fall into buying cheap and unsafe batteries, our Dell batteries are 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: We’re so confident in the performance of our replacement laptop batteries that we’re including a 12-month warranty with every single purchase.