Protections — Citi Double Cash vs CitiBusiness AAdvantage
Trip, baggage, rental car, purchase, and cell-phone coverage
Citi Double Cash
extended warranty — Doubles the time period of the original manufacturer's or store warranty up to max 24 months following expiration; original warranty must be 24 months or less; max the lesser of actual purchase price, repair cost, replacement cost, or $10,000 ≈Inferred by source