This keychain sized Apple Watch charger is on sale for over 40% off

If you've got an Apple Watch, you're all about convenience. These trusty devices can deliver your messages, email and other smartphone perks anywhere you go.

Which is why it's a bit of a downer when you have to bring it back home to charge it up. Sure, the standard Apple charger is wireless, but it's still a piece of gear that necessitates a backpack or at least a purse.

Good news, though. This Portable Keychain Apple Watch Charger is one solution that, if anything, is even more portable than its companion device.

As the name implies, you can hook this 2.6 inch-long device to your keychain or belt. Using it is easy and fast: Just remove the cap to reveal a USB tip. You can plug that into any convenient laptop, wall adapter or portable charger and you're set to go. Simply set the Apple Watch on top and it charges wirelessly, just like the original charger.

The Portable Keychain Apple Watch Charger is compatible with all series watches. It's now available for Boing Boing readers at 43% off the retail price.