![]() ![]() This type of feature is indispensable when executed well, since separate charging cables (even if they’re neatly coiled up) take up more space in a bag. ![]() Built-in cables: We preferred power banks with some type of built-in cable or plug.Price: We used a ratio of capacity (mAh) per dollar to break ties between otherwise similar models.We discounted models still undergoing a crowdfunding campaign, as well as brands lacking a visible web presence. Brand reputation: We favored brands that we’ve had good experiences with in the past when it comes to responsive customer support and product reliability.At least a one-year warranty: A year is plenty of time to use your power bank and make sure it’s working properly, although longer warranties are always preferable.Since batteries with a capacity rating of more than 10,000 mAh tend to be bigger, heavier, and more expensive, for this guide we focused primarily on those with enough capacity to give your phone a boost of power or to fully charge it several times. Capacity rating of 2,000 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 14 weighs 6.1 ounces and a Pixel 7 weighs 6.9 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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