Goldberg Tiger 60
5-3004 futaba servos
600 mah receiver batteries
12 oz tank
90 fx

I get 6-7 flights easily at 10-12 minutes each flight on one charge. When I'm done I turn my radio and receiver on to run my batteries down and it still works the controls for another hour or so.

Once they are drained I recharge them back up for 18 hours using the 50/50 mA wall wart charger my radio came with.

600 mah batteries divided by 50 mA charge rate = 12 hours X (1.4) = 16.8 hours for a full charge then I add an extra 1.2 hours charge at the 50 mA rate = my 18 hour charge.

If you want longer performance out of your batteries use a slow charger (wall wart) rather than those fast chargers. The fast chargers will also decrease the life of your batteries compared to a wall wart slow charger.

If you only make only 2 or 3 flights and are afraid to fly any more, make your 2 or 3 flights, turn your receiver and transmitter on, play with the controls, and you'll be surprised at how much longer your controls will still work!