In looking for more batteries, I found the specs for the Sanyo KR1700AU batteries in my Zagi. Sanyo says that at 8C (13.6 amps) the battery lasts about 5.2 minutes. That was exactly my experience. So whoever says they get 7 minutes WOT (Wide Open Throttle) on these batteries is…. well, I don’t think they are.
Also, Sanyo recommends a “fast charge” current of 2600 mA on the KR1700AU! NOT the 1000 mA that the Zagi manual and Cliff Whitney recommends! That means you can peak charge these batteries much faster than you might think!