![]() ![]() Weight: We used an Escali Primo Digital Scale to confirm the advertised weight of each power bank.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 mostly good experiences with in the past when it comes to responsive customer support, widespread availability, and capability to keep models in stock.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, of course, always preferable.Our favorite power banks for laptops with USB-C or AC charging have much higher capacity ratings than the chargers we recommend here. Power banks with a capacity rating of more than 10,000 mAh tend to be bigger, heavier, and more expensive, so for this guide we focused primarily on lower-capacity power banks-those that store enough capacity to give your phone a boost of power or to fully charge it several times without weighing you down. ![]() ![]() For reference, an iPhone 13 battery has a capacity of a little more than 12 watt-hours (about 3,300 milliampere hours), and a 16-inch MacBook Pro battery has a capacity of 100 watt-hours (about 28,000 mAh). 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.Here are the five that beat out the rest. Using our new research methodology, we evaluated the merits of each in a variety of important areas including price, power, ease of use, safety features, user reviews and more. To put together this guide, we looked at dozens of portable jump starters from a variety of manufacturers, some better known than others. They can let you run other 12-volt accessories, such as a tire inflator. Many will also charge your smartphone, laptop or other tech devices. Compact, affordable, and easy to use, the latest lithium-ion chargers are small enough to fit in a glove compartment or under the seat, yet can start your car without jumper cables or waiting for help.Īll of the jump starters we looked at include sophisticated safeguards that protect against electrical malfunctions and even warn you if the cables are connected incorrectly. The best time to think about shopping for a portable jump starter is not when you’re stuck by the side of the road with a dead battery. While we work hard to provide accurate and up to date information that we think you will find relevant, Forbes Home does not and cannot guarantee that any information provided is complete and makes no representations or warranties in connection thereto, nor to the accuracy or applicability thereof. The compensation we receive from advertisers does not influence the recommendations or advice our editorial team provides in our articles or otherwise impact any of the editorial content on Forbes Home. Second, we also include links to advertisers’ offers in some of our articles these “affiliate links” may generate income for our site when you click on them. This site does not include all companies or products available within the market. The compensation we receive for those placements affects how and where advertisers’ offers appear on the site. First, we provide paid placements to advertisers to present their offers. This compensation comes from two main sources. To help support our reporting work, and to continue our ability to provide this content for free to our readers, we receive compensation from the companies that advertise on the Forbes Home site. The Forbes Home editorial team is independent and objective. ![]()
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