The AtomXS is the instant emergency power-up charger every smartphone owner needs

When the new flagship phone of the Android universe, the Samsung S21, rolls out on Jan. 29, it'll be the latest smartphone leap forward, yet still part of a curious trend that doesn't make any buyers happy.

Just like the iPhone 12 when it debuted last year, the S21 will be hitting store shelves without an accompanying power brick that can fast-charge devices over USB-C. While Samsung says it's because many users prefer using their current chargers instead, it's a growing example of what tech users always knew – at the end of the day, you're on your own.

Having ready access to power in a pinch is essential – and the AtomXS 3+ Hour Emergency Keychain Charger can make sure you're never stuck with a dead device.

Unlike one of those bulky traditional power batteries, the AtomXS was built for the moment you most need power: when you're out in the world, can't find a charger, and absolutely have to be able to keep your phone and communications lines open.

At less than 2.5 inches across and weighing just a few ounces, the AtomXS slides right onto a keychain, or fits right in your pocket when you need a quick hit. All it takes is to plug the retractable Lightning, USB, or Micro USB connector into your phone and the tiny, but mighty, high-density battery cell starts funneling its 1,300mAh of power right to your device.

In moments, you'll have up to three hours of extra battery life to make sure your calls keep connecting, your texts keep powering through, and your other vital smartphone operations continue uninterrupted.

The AtomXS powers up when you hit the touch sensor and can hold a charge for up to three months. So even if you aren't super diligent about recharging your AtomXS, it'll have your back for those moments when it's crucial to have power. And whether you're an iOS or an Android user, the AtomXS is available in Lightning, USB-C, or Micro USB varieties.

Usually $49, the AtomXS 3+ Hour Emergency Keychain Charger is on sale right now at 30% off its regular price, only $34.99 while this deal lasts.

Prices subject to change.