more info please...
is this an electric powered airplane which uses a single battery to power the motor, receiver and servo's?
what type battery? (NiCad/ Nimh or Lipo / LIFE?)
in either case it is a good idea, but typically the best way to check them is with a cycling charger (for Nicad/nimh)
in the case of Lipo's LIFE's, most good chargers have a similar function.

Nicad / nimh batteries have considerably different handling requirements than do Lipo/ LIFE's