ORIGINAL: johntammi
So I should probably buy a second batt and have them both charged slowly if expecting alot of flight time. How many flights should I get off one 700mah batt.
Number of flights will vary based on a lot of things.
Number of servos
Type of servos - analog or digital
Time with radio on but not flying - tuning, tweaking controls or "oops, I left my radio turned on".

Drag/resistance in control systems including any stalled conditions
Voltage and capacity of battery pack as well as condition of that pack
Flight loads and style of flying
I advise slow charging overnight whenever possible, monitor batteries at the field with ESV (or built in meters for TX), field charge if needed.