The props make a slight difference on the old phantom. I find I need less throttle to increase altitude. If you have the phantom with the black and silver prop nuts, you can use the props. They require the CW/CCW motors. At night I fly with the old props and during the day with the vision props. You'll find the vision props are louder. I think I get between 90 seconds and 2 minutes of increased flight time. If you really want to increase flight time you can look into upgrading motors, props, and a more powerful battery. After it's all said and done, you may find it more cost efficient to sell your phantom and move over to the phantom 2. Downsize is that $150 battery. If it's like all the other dji products, the battery will be down to $75 by summer.