High-Performance Replacement Battery for Fujitsu Lifebook Laptops Keep your Fujitsu Lifebook running at peak performance with this original-grade 60Wh Li-Polymer replacement battery. Designed specifically for U7412, U7312, E4412, E5412, and other compatible models, this battery delivers long-lasting power and reliable performance with a 15.44V voltage rating and 3915mAh (60Wh) capacity.