Everybody seems to be making battery packs for phones — including Apple. Not so much for the Apple Watch, which gets a day of power for most people but can die if you do a lot of exercising. Griffin's latest accessory is designed to solve for that. It's called the "Travel Power Bank" and it's essentially a little keychain battery with an inductive charging pad for the Apple Watch. It has a simple, square design that isn't exactly pretty, but it's at least unobtrusive enough to chuck in your carry-on or on your keychain just in case you need it. Griffin says that its 800 mAh battery is good for four charges of the Apple Watch — and that you can also use it as a travel charger.

In theory, that second feature means you have one less cable to tote around with you when you travel — but note that it looks like Griffin's battery juices up via microUSB, so you might need an extra cable anyway. Then again, there's a better-than-even chance that the battery pack you bought for your iPhone charges via microUSB anyway. Unfortunately, it doesn't look like it's capable of charging anything other than the Apple Watch.

The Travel Power Bank will retail for $69.99 and will be available for sale in the second quarter of 2016. As for when we'll see phones and watches that don't require us to tote around external batteries, well, let's just say that nobody expects that to happen this year.