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Generally cheaper power banks (the ones found in tourist markets or dirt cheap on eBay) may be subject to safety concerns. Some can cost as little as around $10, while others over $100, depending on factors like brand, quality, technology, features, and more. However, like everything, each charger will differ when it comes to price. For a general rule of thumb, the bigger the capacity, the more expensive the power bank. While the irresponsible ones among us spend all their cash on cool tech (not naming any names here, Barry), the unfortunate reality is that not all of us can spend so wantonly. That said, recent power banks are loaded with big batteries which somehow manage to fit into an astonishingly small device. Do you walk around with bulging pockets or do you travel with a man-bag? Does your handbag have room for a chihuahua or do you pack only the essentials? Typically the smaller the battery, the smaller the power bank. In addition to battery size, physical size is something to consider when buying a power bank. Keep in mind that a larger power bank is subject to restrictions when flying, so inform yourself on the limitations before you take flight. So if you like convenience (or if you’re lazy) a larger power bank is going to offer more charges before it needs recharging. Considering that most phones nowadays have batteries around 2500–3500mAh, a standard 15000mAh power bank can charge an iPhone X at least three times. It may not need to be said but the more power you have, the more charges you will get. Power banks can range from around 1000mAh or so on the low end to a stupefying 120000mAh. The first step in properly choosing a power bank is to determine the battery size you require. Given that power banks are overwhelmingly popular and with so many options, we’ve compiled a Quick Guide to help you make the right selection what do you need to consider when buying one? The Most Important Thing: Power After all, no one wants to buy the technological equivalent of a DC film when you wanted Marvel. Whether you are of the current generation, or are savvier with technology than our parents, it’s likely you take the time to research what you are buying.