Amazon, Wish, Ebay, AliExpress, etc. etc. etc. Go to www.Google.Com and type in "Fitbit One Cable" and be pleasantly surprised at how many results come up. Usually, they're around $2-3 though as low as $1 in quantities. You could even strip down any USB cable and attach alligator clips to it to clip into your Fitbit one, but I'd advise just buying the cable 🙂
If you do try the USB homemade cable please be very careful not to touch the wires or you'll possibly fry your USB port. With the Fitbit charging port facing you on the bottom, the right terminal is positive (+).
