Review on MANCIO Slim Laptop Backpack with USB Charging Port - Vintage Tear Resistant Business Bag for 🎒 Travel, College, School - Casual Daypacks for Men and Women - Fits up to 15.6Inch Macbook - Black by Chris Santos

Good pocket size. Good solid feel of the material and construction itself. Nice color and what looks like quality jewelry and functional details. My only complaint about the design itself is that the side water bottle holders are a little small for many water bottles and they aren't able to securely hold a smaller bottle. So you need to find water bottles that fit snugly but aren't too big. So 3 stars instead of a drinking bottle holder that is too small? Oh no, big USB bug. It is designed to connect the cable to the internal battery for easy charging. That's true, but the cable or USB port they used has such a low bandwidth for power delivery that my girlfriend's S7 barely charged when not in active use and my S21 only charged when it was not used. Both phones will run out of power when actively used, but at a slower rate. We removed the USB adapter and plugged it directly into our battery by threading the cable through the hole, and charging speeds skyrocketed. Noticeable charging when active and fast charging when not in use. This was the main reason for buying this backpack, so it's a big minus for us. Any backpack can make a good backpack, but if you want to add USB pass-through charging, make sure you do it right. Overall: great bag. If you want to use the charging part, I suggest turning off the built-in USB and just threading your own cable through the hole. Don't buy for this feature, buy because you like the design, because it's a very good backpack.