18 parts.

• 14500 Li-ion Battery, 7.4 V 800 mAhCyberBrick
• 16340 Battery ModuleReDo.Pro
• 18650 Battery ModuleReDo.Pro
• 20mm Coin Cell Breakout with SwitchAdafruit
• 3 x AA Battery Holder with Barrel PlugAdafruit
• 3 x AAA Battery Holder with Switch and JSTAdafruit
• 4 x AA Battery Holder with SwitchAdafruit
• 4 x AA Battery Holder, SquareSparkFun
• Battery HolderReDo.Pro
• Battery Holder (Parametric)ReDo.Pro
• Coin CellReDo.Pro
• Coin Cell (Parametric)ReDo.Pro
• Coin Cell ClipReDo.Pro
• Coin Cell Clip (Parametric)ReDo.Pro
• Cylindrical BatteryReDo.Pro
• Cylindrical Battery (Parametric)ReDo.Pro
• LiPo BatteryReDo.Pro
• Waterproof 2 x AA Battery Holder with SwitchAdafruit