Laptops > Battery 3-cell 40 - 50Wh 30 - 40Wh 50 - 60Wh 60 - 70Wh 65W Adapter 45W Adapter 6-cell 4-cell 90W Adapter 80 - 90Wh 200W Adapter 280W Adapter 70 - 80Wh 90 - 100Wh