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It’s been a busy week at the 2024 Consumer Electronics Show in Las Vegas, but along with plenty of new tech—like a glare-free OLED TV—there are some tried and true gadgets I’ve been swearing by all week long.

My new secret weapon? Anker’s Nano Power Bank—specifically the 30-watt one—boasts a built-in USB-C cable for easy recharging of an iPhone 15 or Galaxy S23 Ultra, plus two additional ports (USB-C and USB-A) fueled by a 10,000mAh battery inside. It’s saved my phone from dying several times and lets me easily recharge all my devices during a busy work conference.

This isn’t the first time I’ve written about it either, but right now, you can save on the Nano Power Bank at Amazon thanks to double discounts. With an immediate 10% discount and 20% on-page coupon, you can score a 30% savings in total, plus Prime members will score free, fast shipping.

Anker Nano Power Bank, $36 (was $50) at Amazon

Unlike other battery packs, Anker’s is ultra-compact but has enough ports and enough battery power to charge up multiple devices. You can actually charge up to three devices at once, and I particularly like the built-in USB-C cable since it can charge your phone in a pinch. Because of that, it makes a great travel accessory for anything from a day trip to a week-long adventure.

Other than the impressive charging power of the Nano Power, I really appreciate the built-in screen. You can see a quick visualization of the battery percentage left on there, and as you plug devices in, you get a countdown clock for how long until the battery runs out at the current rate of charge. It’s really helpful.

You also get your pick of color with the Nano Power. I personally have it in black, but you can also score it blue, green, or white at Amazon. So, consider Anker’s Nano Power Bank if you’ve been wanting one battery to charge multiple devices while traveling or are tired of lugging around all those extra cords. I don’t travel without it, and at this price, you shouldn’t either.