Toshiba Satellite M30 series laptop users who need to replace their old or worn laptop batteries can buy these 6-cell replacement batteries at USB Phone World. Our quality compatible batteries replace Toshiba PA3331U-1BAS and PA3331U-1BRS Batteries which is the battery used in Toshiba Satellite M30 laptops. Our 6-cell batteries are rated at 4400mAh and 10.8V and have been manufactured using advanced lithium technology. This technology is the primary reason why our batteries perform better than original Toshiba PA3331U-1BAS cells. Although our replacement batteries and the original Toshiba batteries are both 6-cell units, you can expect slighty longer charge times with our batteries. When searching our site for the best replacement battery for your laptop, a good rule of thumb is to search for your new battery by using the part number of the original battery. If you enter the PA3331-1BAS part number into the search field at USB Phone World, you will be directed to pages containing the most compatible battery for your laptop. Our batteries are priced much lower than retail and include a 12-month warranty. USB Phone World welcomes wholesale buyers and our already low prices are reduced further when our batteries are purchased in bulk.