![]() ![]() The terms describe what the batteries are made with. Lithium-ion and lithium-polymer: There are two types of batteries used in power banks: lithium-ion batteries and lithium-polymer batteries. ![]() The bigger the mAh number, the more power it holds. For example, smartphones generally have batteries of 2,500mAh, and power banks can store anywhere from 3,000mAh to 40,000mAh. MAh: This is a measurement of a battery’s capacity. As you’re looking for a power bank, make sure to get one that holds enough for all of the devices you want to use it with.Īs you’re researching power banks, you’re likely to come across a soup of industry terms. Power bank capacities vary widely, but they will always be listed as part of the product specifications. Samsung Galaxy phones have a battery that stores 3,000mAh. IPhone batteries typically have a capacity of around 2,000mAh. Power bank capacities are rated in milliamp-hours (written as mAh), which is a measurement of charge that’s sometimes referred to as current flow over time. ![]() It makes sense, therefore, that available storage is the most important attribute. A power bank has one job: to receive and store energy for your devices. There are a lot of different features that differentiate various power bank models, but far and away the most important one is storage capacity. Power bank cases are great for carrying USB cables and keeping your charging ports clean and free from dust. To learn more about batteries and flying, visit the power bank you buy doesn’t include a case, buy one. For milliamp hours (mAh), divide by 1,000 and then multiply by the volts. For example, a 12-volt battery rated to 8 amp hours is rated at 96 watt hours. To calculate watt hours, multiply the volts (V) by the ampere hours (Ah). ![]() While most batteries are sold in mAh, FAA rules focus on “watt hours” (Wh): Lithium ion rechargeable batteries, like in a power bank, are limited to a rating of 100-watt hours per battery. Most portable chargers have a capacity measured in milliamp-hours (mAh), which determines how much energy they can store and how many times they can charge a device before needing to be recharged themselves - the higher the number, the more charges you’ll get. The more ports, the more devices you can charge at once. A Lightning port is used exclusively to charge Apple devices, such as iPhones and iPads. USB-A ports are common for charging many smartphones and tablets, though USB-C ports are becoming even more common because they can support fast charging and be used to charge the power bank itself. There are several types of ports on power banks, and you’ll want to choose what’s compatible with your devices (or be prepared to purchase a separate adapter). The higher the battery life, the better - but this will often also increase the product’s size and cost, so factor that in. Battery life refers to the number of times a power bank can charge your device(s) before it needs to be recharged. Charge speed tells you how long it takes to charge specific devices, and this will vary by device type (laptops will take longer to charge than smartphones, for instance). The two biggest factors when choosing which portable power bank to bring on your travels are charge time and battery life. Tips for Buying Power Banks for Travel Consider charge time and battery life The Details: 3.3 x 2.2 x 0.18 inches | 2.1 ounces | 2,300 mAh | 1 Input Port | 1 lighting, 1 USB-C, 1 Micro-USB Output Ports And finally, you’ll never have to guess where you stand, because the indicator lights let you know how much power remains. You’ll also never be without it because you can literally store it in your wallet - plus, you don’t have to carry any separate cables, because it comes with built-ins for Android and Apple devices. As long as you understand this device’s limitations, you’ll be impressed with this little charger (read: it won’t have enough juice to power up your devices for an international flight, so expect a boost of 30-90 percent of your phone’s charging power). It’s hard to imagine that a charger the size of a credit card even exists, but it does - and the ChargeCard will have you rethinking how far technology has come. It’s more for an emergency boost than fully charging devices, and it works best on phones. ![]()
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