I went out to my Slingshot and it would not energize.

If you ignore the indicators of a low battery; blinking LED, Decrease in range, the key fob has one more Barrier to prevent you from being stranded. If you ignore the warning signs of a low battery the key fob will kick itself out of Automatic mode and put itself back into manual mode as a way to preserve any power it may have left. You will need to press the black button on your key fob in order to get the Slingshot to start. ** Warning** DO NOT relay on this as your indicator of needing to change your batteries.