The more I think about this the more I want to see a flashlight implemented into a powerpack. The difference is, I think the pack should be rugged to an extent. Similar to the jump start pack you curently make, with its rugged design and built in light. Having a device that can do more than one thing is beneficial and crucial to those who are outdoors more often like those who camp, those who travel, and those who are always on the go.
Sure some people say they would never use it or they use their phone, but when push comes to shove and their battery is either dead or they need a brighter light they can just reach for their powerpack which most people always carry and light up their way.
If we had a powerpack that's first design is a flashlight, and secondary purpose was to charge devices maybe more would acept it. Which I do like this idea, it would be more cumbersome for some people so having a device that is slim/flat with a high powered LED would be more beneficial. It can easily fit in a locket, glove box, or even a day pack without taking up much room and can be used as needed