Laptop Battery PATONA for LENOVO ThinkPad X240 4400mAh Li-Ion 10.8V:Have you been experiencing battery capacity loss? This laptop battery PATONA for LENOVO ThinkPad X240 4400mAh Li-Ion 10.8V is a backup power supply for selected models of Lenovo laptops. A dead laptop battery or a power cut wont upset you anymore. A spare laptop battery is useful as a second battery for your travels when you cant access an electrical outlet, but still need to use your laptop. PATONA for LENOVO ThinkPad X240 4400mAh Li-Ion 10.8V Battery Key Features Alternative Lithium-ion (Li-ion) battery Safe substitute for the original battery Capacity: 4400mAh, voltage: 10,8V Compatible with Lenovo laptops, more specifically the ThinkPad models Supplies your laptop with power when you are on the go Ensures an improved battery life and allows you to get more work done Tip: Frequent use causes a reduced battery life. Follow the instructions on correct charging and discharging that you can find in the manual in order to reduce the risk of compromised performance.