The power capacity of the iMuto power bank is 20,000mAh and you can expect a pretty close Output capacity near the same since the charging speed isn’t that fast.

The most notable feature is the LED display that shows the power capacity in a numeric value and this is on top of the power bank. It takes around three hours to charge from empty (considerably less time than the Juice Power Station), and once charged, Belkin says its tests show that charge will not diminish by more than 50pc even after a year’s time left dormant – all very impressive, and useful. But which one is best? I tried a range of power banks at festivals, on camping trips and flights, as well as during the course of my everyday routine, and reviewed them with the size, weight, charging speed, ease of use and the warranty in mind. Like charging most smartphones about 5 times or more. Tabletsare going to charge fully but fewer times with tablets like the iPad Mini 2 and 4; but they’re going to manage about 1.5 charges because the charging speed of tablets is faster and as a result, more power capacity is lost. DevicesThe iMuto has a max Input recharge speed of 2 Amps, so you’re going to have to use a 2 Amp wall charger if you want it to charge that fast. The two USB ports mean that you can charge two devices at once. It offers pass-through charging and cleverly, the efficient circuitry prioritizes charging your connected device first and then funnels the extra energy to your IonBank itself at the same time, so you get the optimum run time out of the time you have spent plugged in. It’s a small high capacity portable charger but don’t let that fool you because the weight is 1 pound. Nothing special about the build, with it being made out of plastic, it’s solid but don’t drop it since it’s heavy. It has quite a few safety tech features but it doesn’t stop charging automatically even though it says it does.

The Juice Power Station boasts a lithium battery with a charging capacity of 11,200mAh. For me, that's plenty: enough juice to provide more than six smartphone charges, or fully charge an iPad Air. If you need more power on your weekend away, you might need to do something about your screen usage...Another point of difference which makes the Moshi IonSlim 10k stand out as are the battery's lithium-polymer cells, which have no ‘memory effect’ (an effect observed in some rechargeable batteries that causes them to hold less charge over time, because the battery appears to "remember" a smaller capacity). You can charge the IonSlim as frequently as you wish; it should stand the test of time. Versatility is also worth considering – for example, can you use the charger for multiple devices? What devices is it compatible with? Does it offer pass-through charging (which means you can charge the bank itself, while using it to charge a connected device)? It looks metallic, but the case is actually made of plastic polycarbonate, which houses the lightweight lithium-ion polymer battery cells that power it. Again, it has two USB ports, one that has a 2.4A amperage, and one 2A, and four LED indicators that show the battery level. Another cool fact about Duracell's offering is that even the biggest is only 203g, considerably lighter than comparable products which is nice. Multiple Smart Protection System: We use high quality A-Class Lithium polymer batteries, together with multiple smart protection technology, to keep your devices safe from over-charging, over-voltage, over-current, and short circuit

It's still working just as well as it did when I first bought it. I've been so happy with it we decided to buy another one for our upcoming Disney trip. I definitely recommend this charger to anyone who asks!

There are two payoff to all this. The first is that the product is more complicated to use than the Power Station or Belkin – you need to take care to get the right cable in the right slot (an exhaustive instruction manual makes this easy, if somewhat time consuming, to learn). The use of the power capacity display is really helpful because it gives a more accurate reading than just LED dots and features like these need to be become more prevalent, just how the Lumina 15,000mAh uses it as well. About the product: I have been using this device for about a month. There is one recurring problem: When the power bank is fully charged at 100%, I plug in my phone (Galaxy A22). As the phone is charged the power bank battery indicator shows battery percentage reduces at a steady rate. The power bank is supposed to be able to charge my phone twice before requiring recharged. After charging my phone the first time, the indicator shows it has 45% of battery left. When I charge the phone the second time, the last 20% of the battery in the power bank completely drains in a few minutes. My phone only gets charged about 50% the second time. In other words, the power bank holds less than 80% of the battery. Basically the device I received is defective. You can find the two USB charging Output ports on the short side, a flashlight between the 2 Output ports, on one long side is where the Micro-USB Input is and the on the other long side is where the power button is.