How to charge a Philips OneBlade QP2520 without a charger

So there I was. Half-shaven with a stupid look on my face. My beard trimmer had just died. Any other time this would not have been that much of an issue. Just go get the charger from the bag, right? Right? Not really. You see, I had also realized that while the charger was indeed in the bag I knew it to be, the bag itself was 3000 kilometers away.