BTI LN-E535 Replacement Battery For Lenovo ThinkPad E440 Laptop Computers, 4400 mAh, LN-E535

Proprietary Battery Size battery - A convenient spare for your notebook, giving you peace of mind 4400 mAh battery capacity allows longer, charged usage in a dependable manner with maximum feasibility Proprietary Battery Size battery size for better reliance and optimal performance 10.8 V DC battery - Ensures a steady and uninterrupted supply to your notebook Rechargeable battery - Lasts longer on a single charge than its disposable counterparts Lithium Ion (Li-Ion) battery chemistry for your convenience and better usability