...Most radios come with the standard 600 mAh battery pack. As a general rule, 4 or 5 flights at 10 to 15 minutes each will put that receiver pack out of business until it's been recharged. A dead receiver pack will ALWAYS equal a dead airplane...
Silversurfer, can u please let me know what other battery packs can give longer flight time, and how much longer they can be flown? A friend of mine who introduced me to flying generally flies until he is .5 volts above his tx low voltage limit to avoid a dead rx battery. This hasn't failed him "yet."