I'm planning to use this for a school that has tons of work and books to carry. Let's see how it holds up. The material is good, but supposedly water-repellent. It was misleading but the contents inside don't get wet. There are 2 layers in the top flap/lid so the outer one absorbs the water and the inner one keeps it out. The biggest problem is that the water bottle pockets are incredibly small. The non-USB side barely fits the *fake* water bottle, which is thinner than most regular water bottles. The USB port side doesn't fit in a bottle, but it's great for holding a phone. However, I don't recommend putting your phone there depending on how many pickpockets are around you. Edit: The quality is pretty bad and after a few months of use, threads are snapping all over the place. The laptop bag doesn't protect either - my laptop bag ripped at the corners (and I don't drop my backpack on the floor and such). It would be better for light, occasional use - if you plan on using it all the time I would recommend paying for a better quality, more expensive backpack. The best backpacks only cost 2-3 times more and last 5 (or more) times longer.
Logitech BRIO Webcam/Logi 4K Pro Magnetic Webcam Lens Cap Cover Kit for Ultimate Privacy and Lens Protection
8 Review
π HQRP 2-Pack Gumstick Battery Compatible with Sony NC-5WM, NC-6WM, WM-701C & More - Long-lasting Power for Multiple Sony Devices
5 Review
π Dell AAZ60 Latitude 14 7470 E7470 Compatible Battery Cable Replacement - Efficient J60J5 Battery Wire Cord, 49W6G 049W6G C020029500 - Black
3 Review
π VINTRONS FLUKE 3105035 Ti20-RBP Replacement Battery - Ti10, Ti20, Ti25, TiR Models
3 Review