Battery for dell inspiron 13r, 14r, 15r, 17r, m5030, n5030, n7010 312-0233, j1knnullThe BTI Notebook Battery is the dependable upgrade you need for reliable notebook performance on the go. Engineered for notebook users who value consistency, efficiency, and extended use, this battery delivers a robust 4400 mAh capacity at a steady 10. 8 V DC. As a rechargeable lithium ion solution, its designed to power your laptop through lengthy work sessions, streaming marathons, and travel days without the constant worry of running out of juice.