Toshiba 6-cell Slice Expansion Battery Pack Lithium-Ion (Li-Ion) 4000mAh 10.8V rechargeable battery

6-cell Slice Expansion Battery Pack, 10.8V, 4000mAh, Lithium Ion, Portege M750, M700, M400 tablet PCs, Satellite R20, Tecra M7 This 6-cell rechargeable, removable Lithium Ion battery gives you plenty of battery life for those long meetings and flights. It easily connects to the bottom of the notebook for quick change-outs while the contoured design raises the back of the PC to a comfortable typing angle. Rubber feet prevent sliding so it stays put on the desktop giving you a firm typing surface. This secondary slice battery provides up to 4.85 hours computing time in addition to the primary battery pack. Get the mobility you need to stay productive longer.