This is the best price I’ve seen for a 15,000mAh battery pack. (Just two years ago I paid $(removed) for a 6000mAh Mophie Juice Pack Powerstation Duo.)
If you use code RJTZMPYG you can get the Kmashi 15,000mAh battery pack for $(removed) on Amazon. It’s got dual ports so you can share its juice with a friend or spouse who isn’t as prepared as you.