I travel a lot for work, and for obvious reasons, I take my electric toothbrush with me on all my trips. But after one journey, I got into my hotel room, unpacked my toiletries and found that my electric toothbrush was completely dead, even though I’d charged it beforehand.
After little deducing, I realised that when I’d packed my electric toothbrush, the contents in my bag must have accidentally pressed against the on/off button. So, while I was sitting on the plane, my toothbrush was working away, brushing absolutely nothing and draining the battery in the process.