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Portable usb port portable#
Portable usb port pro#

Charging output of USB-C ports: We measured USB-C output by connecting a half-charged power bank to a Total Phase USB Power Delivery Analyzer, an Apple USB-C cable, and a MacBook Pro.We then turned up the amperage of the load tester as far as it could go without overloading the power bank and recorded the volts and amps we measured with the PortaPow to calculate the maximum output (watts). Charging output of USB-A ports: We measured USB-A output by connecting a half-charged power bank to a PortaPow and a Drok USB load tester.We considered how easy and intuitive its features-such as the power buttons, charging-status lights, built-in cables, fold-out AC plug, or flashlight-were to use. Look and feel: We took note of each power bank’s bulk and its exterior texture.Size: Rather than measure the length, width, and depth of each power bank-which would have been tedious and not terribly meaningful for most people-we considered size in terms of whether a power bank fit inside a wallet, a pocket (we tried a variety of pants, skirt, and jacket pockets), or an accessory pouch.Weight: We used an Escali Primo Digital Scale to confirm the advertised weight of each power bank.ZMI PowerPack Ambi 10K Dual USB-C Power Bank.

Portable usb port portable#

Xcentz 10,000 mAh PD Portable Charger (PB-34011).Xcentz 5,000 mAh PD Portable Charger (PB-32011).Tronsmart Trim 10000mAh USB-C Power Bank.Jackery 6700mAh Portable Charger with Dual USB Wall Charger (discontinued).EasyAcc 6000mAh Ultra-Slim Power Bank (Micro-USB).EasyAcc 6000mAh Ultra-Slim Power Bank (Lightning).We discounted crowdfunded or less-established brands and those lacking a visible web presence or customer support. Brand reputation: We favored brands that we’ve had mostly good experiences with in the past in terms of responsive customer support, widespread availability, and ability to keep models in stock.Price: We used a ratio of capacity (mAh) per dollar to break ties between otherwise similar models.At least a one-year warranty: A year is plenty of time to use your power bank and make sure it’s working properly, though longer warranties are of course always preferable.Our picks in our guide to the best portable laptop chargers offer higher capacities and AC output ports. Power banks with a capacity rating of 10,000 mAh and up tend to be bigger, heavier, and more expensive, so for this guide we primarily focused on lower-capacity power banks-those that offered enough capacity to give your phone a boost of power or to fully charge it several times without weighing you down.

Portable usb port pro#

For reference, an iPhone 12 battery has a capacity of 10 watt-hours (about 2,800 milliampere hours), and a 16-inch MacBook Pro battery has a capacity of 100 Wh (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 set the weight cutoff at 8 ounces since an iPhone 12 weighs 5.8 ounces and we don’t think most people want to carry something in their pocket or purse that weighs much more than a smartphone.

No heavier than 8 ounces: Power banks should be small and lightweight, making them easy to carry around for an entire day in a wallet, pocket, or bag.

This feature is indispensable when well integrated because it reduces the number of cables you have to carry around and (eventually, inevitably) disentangle from the rest of your stuff.

Built-in cables: We preferred that the power banks-especially the smaller, low-capacity models-have some type of built-in cable.

These capabilities ensure top charging (output) and recharging (input) speeds.

Powerful output and input: For models with USB-C output or input, we preferred those rated for at least 15-watt charging for models with USB-A output or Micro-USB input, we looked for those rated for 8 watts or more.