This Compatabile extended battery for Treo 800w provides more than double the capacity of the standard battery. Even with heavy phone and data usage, this battery will keep your Treo charged and ready to go. Includes a color matching replacement door with our soft-touch "rubberized" texture to improve grip. Extends the depth of your device by only 5mm. This battery is a must have for Treo 800w users. Note: All battery claims are dependent upon usage patterns, network configuration and many other factors; actual results will vary. Note: This Product is not Made by Palm.