How often do you find yourself looking for an outlet in a crowded airport? Or in an older classroom that has few accessible outlets? The latter situation is what I’ve routinely found myself in, while teaching and taking classes. I decided to fix the problem by carrying around my own power source. I went out and grabbed a ChargeTech portable battery pack (24000 mAh size) for $150 on Amazon. After a month with the battery pack, I’ve found myself asking, was it worth it?