USB cables, battery and connector compatibility
Ask which cables or battery components come with the selected offer. Check where your own power bank would sit and whether it can be removed without unpacking everything. Connector compatibility and access are more useful comparison points than the simple presence of a port on the outside of the bag.
Documents, electronics and flight checks
Set aside the items needed before arrival and examine how the pockets support that set. Avoid letting the charging feature dominate the purchase if the main compartment is awkward for clothing. Confirm the full exterior dimensions and current carrier requirements, and consult applicable battery rules before flying with a power bank.
