SummaryHolds 8-9 AA batteries, has a radius at the bottom of the dispenser which pushes the next battery out on command. No jams! Please post photos of your prints! InstructionsABS: extruder 220 degrees celcius, Platform: 110 degrees celcius Prints fairly well without support material. Model shown was printed with no support material. However, it may be a good idea to use it to prevent any defects when bridging the dispensing arc.