with Built-in Cables and AC Wall Plug | 20W Fast Charging Power Bank, Power 3 Devices at Once, Family Travel Essential Battery Pack for iPhone, Samsung, Android
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What it is
4 attributes, in the retailer’s own words.
Color
purple
Dimensions
5.91 × 2.83 × 1.09 inches
Model
C2046S
Warranty
36 months support
Black Friday is Friday, November 27, 2026. Amazon’s Black Friday deals run November 19–30, through Cyber Monday, from 12:01 a.m. PT (3:01 a.m. ET) on November 19. , Amazon lists charmast 20000mAh Portable Charger at $29.99, with a deal badge: Limited-time deal, for Prime members.
Cheaper in Charging & Storage, and what changes
Things of the same kind for at least 10% less than $29.99, with the attributes the retailers describe differently. Their words, not our judgement: we compare listings, we do not test products.
Power banks fly in carry-on bags only. The FAA allows lithium-ion batteries of up to 100 watt-hours each, and up to two spares of 101–160 Wh with the airline’s approval; airlines may set lower limits.
Listings give capacity in milliamp-hours. Watt-hours are mAh × the cell voltage ÷ 1,000, so a 20,000 mAh bank at 3.7 V is 74 Wh, and a 27,000 mAh one is just under 100 Wh.
