Power bank prices are dropping ahead of Prime Day's official Oct. 6 start, and one popular pick is bumping right up against federal flight rules.
Amazon's Early Prime Big Deal Days sales already include four power banks with real discounts. Anker's Prime Power Bank (20,100mAh, 140W output) is 25% off at $149.99, and can push a 16-inch MacBook Pro to 50% charge in 28 minutes. ZZI's 60,000mAh charger is 39% off at $29.98, juicing an iPhone 15 to 60% charge in half an hour. EcoFlow's Rapid Pro (27,650mAh, 140W) is 38% off at $109, and Podoru's 5,000mAh MagSafe charger is 23% off at $16.99.
The EcoFlow deal is the one worth a second look before you pack it. At 27,650mAh, the Rapid Pro works out to roughly 102 watt-hours - just over the FAA's 100Wh threshold for carry-on batteries that need no special clearance. That doesn't make it illegal to fly with, but it does mean travelers technically need airline approval, since the FAA permits batteries between 101Wh and 160Wh only with that sign-off.
Worth noting: airport security checks watt-hours, not milliamp-hours, so do that math before your next flight, not after.