If you’re thinking about pulling the trigger on a portable power bank, today looks like the day to do so. For one day, two of Anker’s high-end power banks are at record-low prices on Amazon. The Anker PowerCore Speed 10000 QC is down from $50 to $30 ($20 off), and the Anker PowerCore Speed 20000 is down from $100 to $42 ($58 off). Both boast Qualcomm Quick Charge 3.0 technology, as well as Anker’s own PowerIQ and VoltageBoost technologies — basically, you can charge all your compatible USB devices, fast. If you’re looking for the better deal of the two, go with the Anker PowerCore Speed 20000. With 20,000mAh, you’ll be able to charge your iPhone 7 almost seven times. It’s the ideal travel companion.