Since 1965 Lenmar has been building award winning, high quality power related products. Lenmar personally manages the excellence of our products through every aspect from design to production. Fits: Asus A52, A52F, K42, K42F, K52, K52F, X52, X52F Series Replaces: Asus 07G016CS1875, 07G016CX1875, 70-NXM1B2200Z, 70-NXS1B3000Z, 70-NXS1B3100Z, 70-NXS1B3200Z, 90-NXM1B2000Y, A31-K52, A32-K52, A41-K52, A42-K52 Specifications: Voltage: 11.1V Capacity: 4400mAh Chemistry: Lithium Ion Warranty: 1 Year