Xtar PB2 died on me: Seeking new 18650-based powe bank

After 4 years of my Xtar PB2 working fine, it just stopped working mid-trip when it was badly needed. Taking it apart, the soldering on the USB port had come apart and things crumbled apart as I was examining it. I'm in Chicago with some crazy temps below zero, good chance it got damaged while I was commuting and the effort to repair/replace parts on a $20 power bank isn't worth. Now seeing it's long discontinued...What are my current options for a portable power bank that runs on 18650?