Steve;
Well, maybe you could be a bit more specific on exactly what you must do? And why.
Your question is far too vague to provide any useful help.
To increase battery drain current you simply short the terminals with a copper wire. I suspect you do not want that. The more resistance in a circuit the less current it draws. See "Ohms Law". It is very common to use a capacitor to store power so you can discharge it all at once. See "camera flash". Please rethink your question and provide as much information as possible, including exactly what you are trying to do and why there are certain limits on how you can do it. Lots of great minds here but not one of them is a mind reader to my knowledge.
Sounds like some sort of school assignment from here.
Cheers.
TomW