Originally Posted by GavDorro
2800 at 25C would be sailing very close to complete "power outages".
I often run a 2800mah 30c Zippy without any issue so far. I think battery choice varies so much for different pilots flying styles. If you fly the Zephyr flat out constantly like an EDF jet then you need a higher battery spec, but if you just power up to gain altitude as in glider flight you can get away with a much lower battery spec.