i should put a capacitor between the Vcc and Gnd.
Personally I don't like NiMh because they self-discharge so badly. After a month on the shelf, I need to charge the battery again. I won't do that unless it's a machine I use more often than once a month.
The single cell NiMh AA cells that I was talking about arent delivering the rated 2.1 Ah as well, when I connect the cell across a 1 ohm resistor the terminal voltage drops to 0.8Volts in a matter of seconds, have my batteries gone bad?
The battery has a rated Ah on it and I think it should be able to provided that much current if the load is low enough, for example I am connecting a 1.2 V AA cell directly across a 1 ohm resistor the battery is rated at 2.1Ah but in order to maintain a 1.2V across the load the battery should be able to drive 1.2A of current through it which is well under its rated capacity