101 Great Science Experiments. Dorling Kindersley ... make sure the coil stays balanced and centered. Put the battery and battery holder beside the cup. Attach one end of an alligator clip ...

A scientist named Dr. Holder needs a special sample before he'll help you escape in Atomfall. Here's how to find Sample One.

[Kounotori_DIY] uses a small plastic linear guide as an interface for an 18650 battery holder and as you can see, it’s pretty slick. A little cylindrical container slides out of the assembly ...