![]() ![]() Capacity rating of 1,000 to 10,000 mAh: The capacity rating listed on the power bank tells you roughly how much power it can hold. ![]() We preferred to test power banks weighing 8 ounces or less, since we don’t think most people want to carry something in their pocket or purse that weighs much more than a smartphone (for reference, an iPhone 13 weighs 6.1 ounces and a Pixel 5a weighs 6.5 ounces). No heavier than half a pound: Power banks should be small and lightweight, making them easy to tote around in a wallet, pocket, or bag for an entire day.Anything less powerful would be painfully slow. Likewise, for models with USB-A output or Micro-USB input, we looked for those rated for 8 watts or more. That’s the minimum wattage needed for full USB-C charging and recharging speeds (though devices that support the even faster USB-C standard- USB Power Delivery, or USB PD-need at least 18 watts). Powerful charging and recharging: For models with USB-C output or input, we preferred those rated for at least 15 watts.
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