Some power banks allow you to charge them while they charge your connected devices, freeing up power sockets (passthrough charging); some support auto-on and -off, meaning you don’t need to press a button to begin charging, and needn’t worry about power being wasted once your phone– or tablet‘s battery reaches 100 percent; some support the latest reversible USB-C format that means no more fumbling for cables; and some feature built-in LED torches that make that fumbling for those cables much easier in the dark. Of that long list of attributes that allow us to differentiate between power banks, the Lumsing Glory P1 Fit supports none. It wouldn’t appear to be off to the best start. Also see: How to improve smartphone battery life. Does that make it a worthless piece of rubbish? Of course not. A power bank’s main job is to charge your phone or tablet when you’re not near a power socket, and that is a job the Lumsing does well. The Glory P1 Fit has plenty of power available to do so, and Lumsing claims 90 percent efficiency from its Grade A lithium-polymer cells. It can also charge three devices at once, which few power banks at this price point can manage. For a 10,000mAh power bank the Lumsing is slim and would slip into an (oversized) jacket pocket, but large, measuring 158x78x13mm and weighing 240g. While no carry case is supplied, its tough plastic build and rounded edges should keep it fairly safe from bumps and scrapes. One thing we weren’t too keen on, however, was the ease with which the matt black casing picked up greasy fingerprints. Our review sample is black with an orange trim, and not dissimilar in design to the EasyAcc 10,000mAh Power Bank. The Glory P1 Fit is also available in white. Its key selling point is the trio of USB ports. Lumsing doesn’t specify the rating of each, but the device’s maximum power output is 16W. That means with three devices connected charging will be pretty slow, with just 5.3W available from each. We’d recommend using the third port only as an emergency, allowing the two remaining ports to deliver a faster 8W of power each. In common with many power bank suppliers Lumsing says the Glory P1 Fit uses intelligent technology to recognise your device type and deliver the correct amount of power. USB will deliver only the amount of power your device requires, but when output is at a premium it makes sense to ensure it is divvied up in the best way possible. Also see: Best desktop chargers 2015. A series of four LEDs are used to show how much power remains inside the bank, which is common among portable chargers at this price. According to the user manual you’ll see four blue LEDs when capacity reaches 95 percent, and should continue charging the Lumsing for a further half an hour to ensure it’s completely full. This seems bizarre, but the alternative is that as soon as you plug in a device one of the LEDs will turn off. Lumsing claims the power bank should charge from zero to full in around six hours. Of course that depends on the rating of the USB charger you use to refill its battery. No wall charger is supplied with the Glory P1, which is standard, so you should use that which came with your phone or tablet. Its Micro-USB input is able to accept 1.8A (9W), which is relatively fast. Read next: How to charge your phone or tablet faster. Follow Marie Brewis on Twitter. Marie is Editor in Chief of Tech Advisor and Macworld. A Journalism graduate from the London College of Printing, she’s worked in tech media for more than 17 years, managing our English language, French and Spanish consumer editorial teams and leading on content strategy through Foundry’s transition from print, to digital, to online - and beyond.