[Jay Kickliter] built his own coin cell battery recharger. This won’t work on the vast majority of coin cells as they are manufactured as disposable parts. But there are rechargeable options out ...

[Jeremy] is building a wireless Wii nunchuk, so he needs a small battery that won’t short out or get punctured in the confines of the controller body. A single coin cell holder is already a bit ...

LIKE BOING BOING BUT NOT THE ADS? CLICK HERE TO GO AD-FREE! Yesterday a redditor named joshcam posted a photo of a coin cell battery with purple colored dots arranged in three concentric semicircles.