This runtime plot is for a AA Minimag with a Technology Associates MagmaLED modification. This is a single LED conversion of a AA Minimag. At the end of 40 hours it was still generating enough light to see your feet with.
Equipment used is a photocell and a Radio Shack 22-805 multimeter with a PC interface that is using ScopeView software (V. 1.08).
The vertical axis in in mA and the horozontal axis is 30 minutes per division. To conserve space, five screens were superimposed over each other to create one plot.
Be aware that your actual battery milage may vary from that indicated by this runtime plot.