Maximal Power LB Dell D500 Replacement Battery for Dell Inspiron 500m, 505m, 510m, 600m, Latitude D500, D505, D510, D520, D600, and D610 (Black) 4400 MAH 6 Cell Li-ion battery 100% Compatible with original manufacturer equipments and chargers Maximalpower Brand is one of top selling brands for replacement batteries at amazon.com for Straight three years backed with 1 year warranty and $1 million product liability coverage Integrated microchip prevents overcharging and lengthens battery life