That’s the best part. Using a brand new set of 3 Yuneec batteries with a total capacity of 12,000mA, when flown lightly with the CGO-4, provides up to 25 minutes of flight time. Unfortunately, successive charge cycles have demonstrated that flight time progressively reduces after only a few charge cycles. Double digit IR values for every battery cell indicates Yuneec’s brand new 920 batteries may be quite old. Another disturbing fact is the first voltage warning occurs relatively soon when using Yuneec batteries.
A pair of after market 5,000mA batteries, total capacity 10,000mA, consistently delivers a little over 21 minutes of flight time with the first voltage warning occurring in flight time well after the stock battery warning. In addition to that the voltage depletion rate of the after market batteries is slower after the first warning.
Making things even more interesting is that a single 8,000mA GiFi battery provides pretty much the same results as when using a pair of 5,000mA after market batteries.
For icing on the cake a set of 3 Yuneec batteries will set you back over $400.00. They are sold in pairs for $279.00/pair. A set of 2 after market batteries can be as low as $100.00 for the pair. The average cost usually runs in the $130.00-$140.00 range. A single GiFi runs about $118.00.
I’ve tested the above extensively with extremely consistent results.