This $40 portable wireless charger is by far my favorite Apple Watch accessory

If you only buy one accessory for your Apple Watch, do yourself a favor and make it the Pantheon Portable Wireless Apple Watch Magnetic Charger. It’s a tiny little device the size of a key chain, and it looks simple enough. But this brilliant gadget actually packs a 700 mAh battery and an Apple Watch wireless charging disc. You’ll be able to charge your Apple Watch while on the go, and you’ll also never have to pack that annoyingly long Apple charging cable when you travel. Seriously, it’s worth its weight in gold.

Here’s what you need to know from the product page:

• APPLE CERTIFIED: This product is made with genuine OEM Apple magnetic chargers, and has been tested and certified by Apple to meet all of their stringent quality and safety requirements. Do not risk damaging your watch with cheap alternatives using non-Apple OEM parts.

• WIRELESS ON THE GO APPLE WATCH CHARGING: The built in 700 mAh lithium ion battery will charge the Series 3 iWatch twice, the series 2 twice, and the series 1 Apple Watch 3 times. PASS THROUGH TECHNOLOGY allows you to use it as a dock on your night stand or desk so that you can charge the charger and your watch at the same time. Perfect for hotels or long trips.

• ULTRA PORTABLE: This is the perfect solution to Apple Watch users who are traveling. Rather than taking your long magnetic charger cable or oversized dock with you, simply bring your lightweight and portable Pantheon keychain charger. Hook it to your backpack or carry it in your bag or pocket. When you need to use it on the go, you can just take it out and use your band or strap to secure it on the charger in your bookbag, purse, or luggage.

• SUPER STYLISH: High quality design and finish but lightweight and easy to carry around.

• PANTHEON 100% MONEY BACK GUARANTEE: Should you have any issues with your keychain charger in the first 12 months, Pantheon Wireless will provide you with a 100% money back guarantee or replace your product under the warranty program. Buy with confidence!

Portable Wireless Apple Watch Magnetic Charger [Apple MFI Certified], Pocket Sized, Built in Po…: $39.99
Portable Wireless Apple Watch Magnetic Charger [Apple MFI Certified], Pocket Sized Keychain for…: $39.99

BGR Top Deals:

1. This $17 Bluetooth tracker has the one feature everyone wishes was in the Tile Mate

2. This cordless vacuum is just as good as a Dyson, and it’s only $99 today on Amazon

Trending Right Now:

1. WhatsApp cofounder and Facebook-made billionaire tells people to delete Facebook

2. Apple may have fixed the thing that makes you avoid the iPhone X

3. New IBM report predicts 5 technologies that will change the world in the next 5 years

See the original version of this article on BGR.com