Instead of imr batteries, I've decided to go with ultrafires as they are much cheaper. I know that they are no where near as good as imrs, but I can't spend a lot on batteries now... It looks like I will use two ultrafires and two dummy batteries (roughly 7.4 volts). I just have four more questions: 1. For bypassing the thermistor, the goal is to make the two wires touch, right? So I can either twist them together, or connect them with a wire right (e tape a wire in place)? 2. Would running 7.4 volts hurt the internals drastically? I don't want burnt wires or anything... Although, the motors will probably burn out eventually. 3. How long do my internals have before dying? 4. What fps should I expect with 7.4 volts?
If you're worried about cost of $10 shipped for 2 EFEST IMR batteries, that tells me that you can't afford to replace the internals of the Stryfe when they die. Which means you shouldn't be doing this mod in the first place.