PREMIUM LAPTOP BATTERY REPLACEMENT: Bring your laptop back to life with Ninjabatt's high-quality laptop battery made of high-quality materials and battery cells, and packed with a bunch of security 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.