Charge completely before using - comes with USB-C to USB-C charging cord.USB-C compatible.It's only 5500 mAh, so it won't charge your phone completely, but has the capacity to allow for pass-through charging - charging the portable charger while it is plugged into your phone or other USB-C compatible device.The instructions state it has 3 charging modes.The default mode is 22W for fast charging.Double clicking the power button will put it into 12W mode.Pressing and holding the power button for 3s will put it into trickle-charging mode - they recommend this for headphones or other low-power devices (you'll know you succeeded when the display begins flashing).To exit trickle charging press the power button once.Pleasantly surprised at how many features it has for the price.Definitely worth the money for portability - there's even currently a 20% off coupon on the listing.

This charger is amazing. Great quality, bring screen, when you are charging it for power, it does it pretty fast. When you are charging your phone, a full charge is about 30 min. I take in my purse with me everywhere. What’s great is that when you are traveling, you don’t have to find a charging station. I recommend. You’ll be glad you got it.

I had one of these with a lightning connector in the past. I used it more than I had expected, and I missed it when I lost it. I've upgraded my phone to the USB-C era and knew I needed one of these. This is the same brand I had before, and it does a great job as well. The hidden display is a style upgrade, but the device is as simple as ever. Just plug it in, and it begins charging. I'll tell you the real trick here: you must have it charged and with you.

I like this charger because it doesn't require a cable and is small. I toss it in my work bag and forget about it until I need it. It won't replace my larger charger that I use when I'm out for the whole day at the beach or playing an all day PokemonGo event. But it doesn't need to be that robust.What I need it for is when I'm out touring properties for work and using my phone's camera to snap pictures of damages. I just need a quick boost while I'm on the work floor and when I get back in the car, I recharge this or top off my phone while I drive to the next site. Just a lot less weight, size, and no cables to tangle with.I like that this charger can charge a phone while it is being charged itself. Also, it has 3 charging modes:*Plug in and power on to charge at full strength of 22.5w*Double Click pwr to charge at 12w*Long Press pwr for 3s to trickle charge low power items like headphones and just click pwr again to exit.All these features are very nice to have and I recommend this product.