How we work

How we keep the Miady catalog current

What changes on miady.co, how often, and where each figure on a product page comes from.

Prices

We update prices on a schedule, and the whole catalog moves at once rather than one product at a time. The catalog was last updated on October 2, 2026. A price can still change between that update and the moment you open your cart. Where the two differ, the price at checkout is the one you pay.

What leaves the site and what comes back

When a capacity, a pack size or a color stops being offered, it leaves the site at the next update. Nothing is erased from our product data, so once it is offered again, it returns by itself on the update after that. A product with no price at all steps off the site the same way and comes back the same way.

Where the specs come from

Capacity, output in watts, amps, volts, wire gauge, length and pack counts come from our own product data. If two descriptions of the same product disagree, you see the narrower figure, or no figure. Watt-hours are worked out rather than copied: capacity in mAh times 3.7 volts, divided by 1,000. By that sum a 10,000mAh bank holds 37 Wh, and a 20,000mAh bank holds 74 Wh.

Ratings

Star ratings belong to a product family, not to one color or one pack. Every color of a given power bank shares a single pool of reviews, so that pool is counted once. A total across the catalog adds each family a single time, however many colors and packs it comes in. Products too new to have reviews show no stars at all, rather than a figure borrowed from a neighbor on the shelf.

Sources

Our guides lean on public sources: the FAA and TSA on carrying lithium batteries, the Consumer Product Safety Commission on extension cords, OSHA on portable generators and the EPA on used household batteries. We read each of them on October 2, 2026, and each is named with a short note on what it says. When a source changes its advice, the guide that cites it changes too.

Spot a figure that looks wrong? Write to chargeup@miady.co, and we correct the page and the product data behind it.

This is general information, not safety advice for your devices, your trip or your wiring. The label on each product, your airline and a licensed electrician have the final word in their own areas.

The public sources behind our guides

Federal Aviation Administration, PackSafe: Lithium Batteries. Spare lithium batteries and power banks travel in carry-on bags only, never checked. Each lithium-ion battery is limited to 100 Wh, up to two spares of 101 to 160 Wh need airline approval, and terminals must be protected from short circuit. Read October 2, 2026.
Transportation Security Administration, What Can I Bring? Power Banks. Power banks and portable chargers with a lithium-ion battery are allowed in carry-on bags and prohibited in checked luggage, and the page points travelers to FAA guidance for details. Read October 2, 2026.
U.S. Consumer Product Safety Commission, Household Extension Cords Can Cause Fires (Publication 5032). Overheating usually comes from plugging in more watts than a cord can handle, so check the rating on its tag or packaging. Extension cords are for temporary use, should be at least 16 AWG, and should not run under carpets or furniture. Read October 2, 2026.
Occupational Safety and Health Administration, Using Portable Generators Safely (Fact Sheet). Never connect a generator directly to a building's wiring unless a qualified electrician has installed a transfer switch, because a direct connection can energize lines far away and endanger utility workers. Use grounded, undamaged cords rated in watts or amps for the load. Read October 2, 2026.
U.S. Environmental Protection Agency, Used Household Batteries. Lead-acid batteries, including small sealed ones, do not belong in the trash or curbside recycling. Take them to a shop that sells batteries, a recycler or household hazardous waste collection, with terminals taped or each battery in its own bag. Read October 2, 2026.