Your Carry-On already comes with a removable charger.  Add a spare if you're constantly on the move. It pops out with one click.

• Specs
• Materials
• Devices

• - Capacity 10,050 mAh (37 WH)
  - USB A & C ports: QC 3.0 12W and 2.4A
  - Size: 5.0" x 2.4" x 0.8”
  - Weight: 0.5 lbs 
  - TSA, DOT, FAA, airline compliant
  - Adapter and charging cable included
• - Aluminum-alloy encasing
  - Cells from LG and Panasonic
• - Apple and Android phones and tablets
  - iPhone 8: two full charges
  - iPhone 6: four full charges
  - iPad mini: one full charge
  - iPad Air: 75% of a full charge