Never worry about running out of battery power with this Uniwill 7553S4000S1P1 replacement battery by Amstron. With a capacity of 4800mAh, this high capacity battery will work seamlessly when you are on the move. The LUN-12 is precision-engineered and rigorously tested to be 100% compatible with the Uniwill N755 and many other series of notebooks. Take your work on the road with you without sacrificing performance and productivity with Amstron brand Toshiba laptop batteries.