The single USB output and Micro-USB input sit on the right edge, alongside four LEDs that are activated with a press of the small button on the side to show how much power remains. This power bank does not support auto-on, so you must also press this button to begin charging an attached phone. Also see: How to charge your phone’s battery faster The attention of detail goes right to the bundled Micro-USB lead, which is a short gold nylon-braided cable that comes complete with a Lightning adaptor for iPhone users. And while the whole package might be more appealing still if it used metal rather than plastic, it looks very sophisticated nonetheless. It’s also slim and reasonably lightweight at 195g, given the capacity. See all power bank reviews So where’s the catch? To be honest, there is no catch. So this power bank doesn’t support Quick Charge or USB-C, nor feature an LCD screen, but the vast majority of users won’t have a need for QC3 or USB-C just yet, and at this price you cannot really complain. Also see: How to improve smartphone battery life We were pleasantly surprised to find still-fast inputs and outputs, albeit only one of each. The full-size USB output offers up to 10.5W for an attached device, while the Micro-USB input can accept 10W. Usefully, you can charge the power bank and a connected phone or tablet at the same time from a single mains outlet. With 8,000mAh capacity and an industry-standard efficiency of between 65- and 70 percent, you can expect around 5500mAh of available power to charge your phone or tablet. That might fully charge most Android phones twice, or an iPhone three times. Also see: Best MiFi 2016 Read next: Best desktop chargers 2016. 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.