I have the original Iris purchased in January 2014. Just received the Iris+ upgrade kit this week. First thing I did was charge up the Iris+ 5100mah battery and try a battery test in the old Iris before installing the upgrade kit. All of these prior and present flight times are loitering with no legs, gimbal or camera. It's bone stock except for the GPS/Compass mast I added. I land right exactly at 10.50 volts for each test.
I have tried about 6 different batteries on my old Iris in this configuration and the longest flight ever was slightly over 16 minutes with a Zippy 5000.
Looking at the Iris+ battery's size and weight I highly doubted that it really had 5100mah in it.
After the first charge the bird loitered for 19min 18sec. Charged it back up and did it again - 19min 16sec. In addition, it was the coolest battery I have ever pulled out of the Iris right after a flight. It was warm but not near as hot as normal.
Both times when I put it back on the charger it took right at 5700mah. The charger is set for 10.6 volts for 3 seconds in balance mode.
It is by far the best power to weight ratio I have found while searching for the perfect battery to use in the Iris.
Please tell me I didn't get a fluke. if their all like this I'll order 4 more:)