I found a few more examples of makeshift bomb triggers from Iraq. A soldier named Chris Heathscott posted this picture on the Black Five site. As they state: "Soldiers from the 39th Brigade Combat Team recently hit the jackpot in Taji, Iraq. After some intense fighting, they nabbed a terrorist leader and cache of weapons and items used for IEDs (Improvised Explosive Device). One type of trigger device found was a cell phone rigged up to a motorcycle battery which allows the trigger to remain operational for an extended period."
I don't know much about the second image: