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It has a 20,000-mAh battery, built-in cables for iPhones and Androids, and right now it's on sale for 50% off. Emergency Portable Power

Getting caught with a dead battery while you're on the go can throw off your entire day. And unless you want to stop everything to track down an outlet, it's worth snagging a portable charger -- especially when you can find one on sale. Right now, Amazon is offering 50% off this 20,000-mAh iWalk portable charger when you use the promo code IWALK222, so you can pick it up for just $20. There's no set expiration for this deal, but you may want to get your order in sooner rather than later if you don't want to miss out on these savings. 

The best part about this iWalk portable charger is that it comes with built-in cables, so you don't have to worry about carrying or tracking down the right cords. It has both a USB-C and a Lightning cable, so it'll charge both Androids and iPhones, and it has an extra USB-A and USB-C port, so it can charge up to four devices at a time. It supports 18-watt fast charging, and with that 20,000-mAh capacity, it can recharge your phone roughly five times, or your tablet around twice -- depending on the model. It's also just 1.6 inches thick, and weighs in at just over a pound, so it's easy to slip in your pocket or backpack and take with you just about anywhere. 

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