Fancy Buying&reg; Battery for Lenovo / IBM ThinkPad E40 E50 L410 L420 L510 L520 L412 L412 SL410 SL510 T410 T510 T520 W510 W520 ; ThinkPad Edge 14 15 E425 E520 E525 Capacity: 5200mAh/56Wh Voltage: 10.8V Cells: 6-cell All products are CE-/FCC-/RoHS-Certified by reputable, qualified and accredited testing laboratories. Strict guidelines for compatibility. Built-in circuit protection. Automatic power cut off at high electric current, voltage or temperature ensures safety and extended battery life. Operation time: 1.5 - 3 hours. Actual operation time varies depending on types of the device and the way it is used. 12-months hassle-free warranty service. Please check if this battery is compatible with your computer before purchasing. Part numbers of compatible batteries and Computers are listed as following.