[apparent]

The month-long battery life ensures you won't have to carry another cable.

From the 360° shot on the product page, these appeare to use a proprietary cable, like almost all other smartwatches.

[ajolly]

To be fair the Pebble "proprietary cable" is simply applying five volt voltage to the back of the watch.

I'm definitely ended up on vacation without the cable and just cut the ends off a USB cable to charge my watch.