No, that's the best you can get, 5870mah battery from DJI for a stock setup. That will get you about 23min flight times, and with that time, in calm conditions you can fly about 10 miles, so 4 to 5mi range for RC connection is a good match for the
P4P for battery power duration. If you start going farther than 5mi you'll be risking craft retrieval success. Tips for this kind of distance travel include:
1. Always have LOS orientation to your craft. Sounds fundamental but many pilots forget.
2. 5.8Ghz on auto channel, believe it or not.
3. Navigating from above your craft seems to really help to fly lower to the ground, IE launching from top of a hill or building and flying below the launch point, always LOS.
4. The more rural you are the better, but 5.8Ghz seems to do well in town.
5. Always watch the radar screen to properly point the windsurfer (or other directional antenna) at the craft. Keep the craft triangle icon at the top of the radar circle.
6. Always keep an eye on the RC control signal meter, as well as the HD signal meter. This works as a reminder to point the windsurfer, and when to turn around.