Ni-Mh Batteries

I bought a few rechargable 1.2 v Ni-Mh batteries. However after charging them, i connected them across a 75ohm resistor, & found that they are not able to supply the required current. the voltage drops. The current is steady but not as much as it should be when 1.2 v is connected across 75ohm.
What could be the problem.

I would suggest that either the batteries are not charged fully, or the batteries are flat!.