Via BGR:

It didn’t take long after the Apple Watch went on sale for an accessory to appear that promises to nearly double the battery life. The wipowerband is a clever silicone band that fits inside the Apple Watch band.

The wipowerband contains an embedded 250 mAh battery that extends the time the Apple Watch can work away from the charger. The accessory is charged via Lightning cable.

Not mentioned in this article: how unsightly this accessory will make your beautifully designed smartwatch look.

I don’t care how much more life this gives my watch, there’s no way I’d strap that thing onto the thing I’m strapping to my wrist.

Preferring form over function in this case I suppose.