2-Power 11.1v. 6 cell. 57Wh Laptop Battery - replaces 42T4728

2-POWER's comprehensive range of lithium-ion & polymer battery packs provide unrivalled quality and reliability for virtually all laptop models.|Developed using high-grade cells from manufacturers including Samsung and Panasonic; 2-POWER batteries ensure speedy charging. dependable performance. and allow you to go for longer unplugged.|2-POWER's SmartWatch Protect monitors your device during charging and discharging. protecting your device and battery from short circuiting and over-heating.