Some battery makers have built Qi or MagSafe-compatible wireless charging into the surfaces of their portable batteries. Such batteries mean you can leave the cables at home. Pass-through: If you want to charge your power bank and use it to charge another device simultaneously, it will need pass-through support. The Nimble, GoalZero, Biolite, Mophie, Zendure, and Shargeek portable chargers listed support pass-through charging. Anker discontinued support for pass-through because it found that differences between the output of the wall charger and the input of the device charging can cause the power bank to cycle on and off rapidly and shorten its lifespan. The Monoprice do not support pass-through charging either. We would advise caution when using pass-through, as it can also cause portable chargers to heat up.

The most important thing to do is to match the battery’s output to your phone’s input. For example, if you have an iPhone, be sure the battery has its own Lightning connector or supports USB-A-to-Lightning or USB-C-to-Lightning cables. With the Realme 30W Dart power bank, Realme brings the first low voltage and high current power bank, and isn’t even expensive. This is an industry-first and the pricing is pretty sweet. For those who like to charge the device on the go while travelling (except 2020), this can be an ideal device to carry. This also eliminates the need to look out for a power outlet in public places or having to put up your device to charge slowly with other power banks. To calculate the mAh you’ll actually get when charging devices, multiply the claimed capacity by 3.7 then divide that figure by five (or whatever voltage you’ll be charging at). At the price of Rs 1,999, the Realme Dart Charge power bank will not win any prizes for its capacity. However, its charging speeds are currently unparalleled, even without considering the price. If you use a supported device, it’s a no-brainer. Pre-charge level: If you charge your power bank when it’s 20% full, it will obviously take less time than charging it from 0%. Also, it’s generally recommended not to leave a power bank discharge to 0% on a regular basis, as it can affect the battery life in the long run.Lithium ion batteries, including most power banks, can be carried on planes as hand luggage, but should not be kept in the hold. You may need special permission to carry any battery rated at more than 100Wh (watt hours). That’s around 27,000mAh, which is quite large.

The three basic rules that have kept me safe (thus far) through testing dozens and dozens of batteries are: If you have a newer Android phone, or the latest iPhone 15 models, you'll want a power bank with faster charging speeds to get your battery full faster. Charging speed is measured in wattage, and the iPhone 15 can charge just a bit faster than 15W, while the Galaxy S23 Ultra can charge up to 45W.You need a lot of power: Thankfully, the battery on the Tylt Bottle 2 isn't so big it adds too much weight, but that also means it isn't powerful enough for multiple charges. The best aspect of the PowerCore 5000 is that it hit 19% after 15 minutes, which is 7% above the Miady power banks. There's nothing particularly wrong with this charger, but nothing impressive either. If you got it as a present, you might hold onto it and get a ton of use out of it. If it goes on sale for a deep discount, we wouldn't be against considering it. But at the end of the day, it's low on our list for a reason. Browse our full selection of power banks online or shop in store at B&M. We have plenty of other affordable Mobile and Tablet accessories too - so you can complete your tech setup without going over budget. Recycle your old Electricals with us! This is a popular cable type for charging power banks, older smartphones and other small devices - so there's a good chance you already have some around your home. Unlike USB-C and Lightning, micro USB cables need to plugged in the right way around - which can make them fiddly at times. Lightning (input)

Dimensions: 10.39 x 6.91 x 2.01 cm | Weight: 223.11g | Capacity: 10,000mAh | Ports: USB-C (input and output) and wireless charging

Charging technology: if the power bank comes with a USB type C port and fast charging technology such as PD or QC that can sustain 30W+, then it will charge much faster compared to a power bank that has a micro USB charging port and a maximum input power of 18W. Due to this factor, you can find power banks with larger capacities that can charge faster than ones that have two times lower capacity overall. The Anker 525 features a PowerIQ USB-A port for fast charging all your devices and other equipment. As for the iPhone 15 Pro, the power bank comes with a USB Type-C port, which supports 20W of USB Power Delivery. It also has a capacity of 20,000mAh, which is enough to charge your iPhone 15 Pro up to 5 times. Additionally, the device also gets an LED indicator, which displays the remaining power and charging status of the power bank.