School evocation (fire)
Casting Time 1 standard action
Range medium (100 ft. + 10 ft./level)
Area 20-ft.-radius burst
Saving Throw Reflex half; Spell Resistance yes
You magically transform a used battery into a powerful explosive device, propelling it in a straight line to a grid intersection within range, at which point it detonates, dealing 9d6 fire damage to all creatures and objects in the area. If you send the battery through a narrow opening, you must make a ranged attack (usually against an Armor Class of 10 for a narrow opening or an Armor Class of 15 for an extremely narrow opening) to avoid hitting the side and detonating it prematurely.