Might Be a Fire Hazard, but Okay
This isn’t exactly what people mean when they talk about aluminum-ion batteries. This guy didn’t have any spare AA batteries on hand, and they didn’t feel like making the trip downtown to pick up a fresh pack. However, they realized that AAA batteries, which they did have lying around, were like AA batteries but just smaller.
So, how to fill the gap between the coil and the battery’s positive end? Tiny aluminum balls ought to do the trick! While we’re showing you this picture, we wouldn’t suggest giving this life hack a try unless you’re absolutely certain that you won’t cause a house fire.