October's Prime Day sale ends today, and the power bank deals are a reminder to check the math yourself.
Several chargers are discounted through the close of Prime Big Deal Days: Anker's Prime 25W foldable MagSafe charger is down to $94.74 from $149.99 (37% off), Belkin's 25K power bank with a built-in USB-C cable is $79.99 instead of $99.99 (20% off), and the Jackery Explorer 300 power station is $239 versus $289 (17% off). The steepest cut belongs to the EcoFlow Rapid Pro, a 27,650mAh pack that drops to $109 from $175.99. That's a 38% discount, not the 43% some roundups advertised.
That gap matters because marketed discounts during sales events routinely get rounded up past what the receipts actually support, and shoppers comparing a handful of percentages rarely do the division themselves. It's a small inflation, but it's the kind of thing that compounds across a sale with dozens of listed deals.
Worth noting for travelers: the EcoFlow's 99.54Wh capacity sits right at the FAA's 100Wh carry-on limit, while the bulkier Jackery power station exceeds it and has to stay out of hand luggage.