Give your mouse the finger with this wild cursor control ring — Prolo Ring hits Kickstarter, hoping to transform your finger into the ultimate macro and gesture device

The battery “exploding” is a secondary concern. If the battery swells in a laptop I am not in any immediate danger. If it swells on a ring it can lead to it being trapped on my finger and potentially causing loss of the digit. I also wouldn’t want to risk a ring catching fire in the process of trying to remove it after it swells.