Hi Jeff,
Only the balance pins are different, 480 being round the 520 and H plus being flat rectangular. The negative and positive connectors pins are the same with all three, the balance pins do not have a mate inside of any of the birds ,so they are inmaterial to power all three birds. The 480 battery will power all of the birds the same as all the other batteries will power any of the three birds. It is not recommended to run High Voltage lipo's in the 480 as they are not made to take them and Yuneec does not recommend nor warranty there use.Haveing said that I have used the 520 batteries in my H r80 to test for longer flight times ,with very minimal gain in times ,the temps on the motors were all up 5° to normal running with standard battery ( used an infrared thermometer) there for the extra cost of high voltage lipo's was not worth the gain. Using the 480 batteries in the 520 and H Plus will only give you a shorter flight time in those birds. They are two different chemistry batteries to be able to get the higher voltage but are still classed as lipo's. That is why you need different chargers and charge leads if you use an other than standard charger , which you should be useing if you want to get the best out of your batteries. There is a site I think it is called the battery university on the Web and it is a very good read ,especially about how temperatures affect voltages and storage capacity. A difference of 16 degrees c to 26 degrees c the lower one has half the capacity available for use, hence why a lot of battery warnings when it is cold and very short times etc. I hope that this helps answer some of your questions and I will attempt to find the address for that battery info ,but you can Google lipo's and it will come up. Johnno Hennessy. Keep flying on the green side of the grass .
