RAVPower is another company that is pretty popular for their battery packs - after all they do have "power" in their name. And right now they have discounted one of their all-time most popular battery packs, to just $35.99 when you use the promo code RAV20100 at checkout. This takes $14 off of the price, making it just $35.99.
This battery pack here from RAVPower is a pretty good one, and a bit future-proof. This is a 20100mAh capacity battery pack, which will allow you to charge your phone around 6 times, definitely great for traveling. But on top of that, it has just about every port you could need. So there are two standard USB-A ports, one of those is a Quick Charge 3.0 port, allowing you to charge your smartphone fairly quickly. Then there is a USB-C and a micro USB port, both of which can be used to charge the battery pack. Now since the USB-C port is indeed a USB-C port, you can use it to charge the battery, or charge whatever you plug into that port. This is great for charging your LG G6, HTC 10 or even the MacBook Pro.
RAVPower doesn't drop the price all that often on their battery packs, so this is a time where you're going to want to jump on this price instantly, before it goes back up, and before they run out of stock. So make sure to use the promo code RAV20100 at checkout.