ZMI QB820 PowerPack 20000 USB-C Portable Charger Power Bank Battery Pack with Power Delivery USB Hub

This is a great power bank. To give you some examples, it will charge very fast from the Apple 87w charger. About 3/4 full in a couple of hours (quite hot), and then it slows down to a trickle. It also charges from the 29w unit, which has a lower top voltage.It is able to fast charge my iPad Pro which also charges fast from the 29w unit, but not from the 87w unit. All in all, it appears to be more flexible on input and output voltages than the Apple units.It will charge a MacBook Pro, but what lets it down is that it does not seem to be able to charge *from* a MacBook Pro, as the battery seems to treat it as something to send power to, rather than receive it from. But it charges so damn fast from the Apple charger that I still give it 5 stars.Looks wise it is fine. 20,000 mAh is what it is. Price is high, but where else can you get a sizeable battery that will fast charge anything you throw at it, including a MBP, via standard USB or USB-C, and recharge 3/4 full in 2 hours?

I bought this for travelling with surface pro and S10 android phone. It is slim and light and has been excellent for rapid recharge of phone and laptop. Phone went from ~25% to 100% in <20mins. Haven't done a time for surface pro. I was going to buy a powerpack with 60000 but they seemed like a big heavy brick and tricky on airlines. This one is 45W with usb C ,works fine with Surface Pro but lightweight and allowed on planes in hand luggage. Perfect

Great power bank. It travels with me everywhere. It quick charges my phone. Charges my XPS laptop and is just amazing.

Great product, arguably the best all round power bank on the market that supports both QC3.0 and PD.This will quick charge my iPhone X to 50% in around 30mins. It’s super fast.Capacity is enough to last a few days. I’ve used the power bank under heavy load, with a mixture of watching Netflix, browsing and social media.Be sure to buy a PD supported wall charger, such as Anker or Apples 30w, 61w or 87w charges that come with MacBook Pro’s.

At 45w in and out, It’s the top performing USBC battery pack you can buy on Amazon.

basically like having 10 of my phones battery in one powerpack, quick charge with usb-3 or usb-c. since charging it I have carried it around in my backpack its been charging my phone, nintendo switch and other peoples phone, i only had to charge it about 3 weeks later after regular use.

This thing is a beast. Never seen a power bank that has such high input / output. It's heavy, but perfect around the house to avoid long cables and charge high power devices. It's better than getting 2 inferior ones and alternating if you have laptops, Nintendo switches, iPads / tablets, phones and want an optimal solution. Just make sure you have a >= 45W PD charger to charge it up with (I'm using 60W in the pic)40W output (enough for docked switch)45W input

My product didn't work so had it returned, was really looking forward to using it to charge the MBP on trips

La usó para mi celular y para mi Nintendo Switch, los carga a buena velocidad, la batería no viene con cargador pero carga bien usando el del Switch

I am pleasantly surprised with this product so far. I have been looking at the bigger names in this space but opted for this based on price, USB-C (input/output), size (physical/capacity), and reviews.The packaging was done very well, quality was almost Apple-esque if you will. They took time to really think about the box and internal of the box. So many times, you order an item and they are sent in a plastic bag or something. Makes you sometimes wonder how much care actually went into the internals of what you purchased.The fit and finish of the product is outstanding and has an aluminum shell...I missed that in the description and thought it was plastic. I do wish that there was some type of rubber grip/bumper on the middle component, which seems to be a frame (just being picky). The overall design is clean and not really a lot to go wrong with it like plastic cracking or LCD breaking, etc. It is heavy but compact...a little larger than my iPhone + device but not by much.I love that, as an Apple user for work and personal, I can use my MBP charger and cable to charge this thing. It charges pretty fast using the USB-C as well. I have only charged two devices so far just on what was left from the factory charge. I like to empty it completely first before I charge it. I topped off an iPad Pro and an iPhone at the same time and they both ramped up rather quickly. Time will tell on how it handles providing power to my MBP and devices. I will be on the road next week, so I am sure it will be tested. It does have a hub function to it as well but I am not sure I will use that feature very often but nice to have just in case.Small things but also like that they have a little travel bag with the device. Most cases add more bulk to an item that already has some bulk to it. Again, not that this is a large item but every little bit helps. Also has a few cables that seem to function just fine.The directions have a ton of odd wording and misspellings but nothing that leaves you scratching your head. The only "function" you need to be aware of is engaging the hub feature by pressing the side button twice but that is really about it.Overall, initially, I am please and if you are looking for good power in a clean design, this is an awesome choice.

I bought the external power pack to recharge my Surface Go on route. And it does the quick charging via the USB-C port very well, with up to 15 W, like the standard power supply. And the external battery allows to recharge the Surface Go more than once, making it very useful on long trip.In addition, the power pack acts as a USB-hub, and I use it frequently to connect to external hard drives. It provides the power to the hard drives, which is often difficult when connecting directly to the Surface Go.And the pack comes with two useful connection cables, and a nice pouch.Only addition that I bought was a longer (1-m) USB-C connection cable that allows me to keep the power pack and attached hard drives in a bag while working with the Surface Go on my lap.

Pictured with the ZMI on the left, and a RavPower 20100 on the right, for size comparison.This is a BEAST of a battery backup, with included Power Delivery. The Power Delivery USB-C port charges my Pixelbook quickly and reliably (40W), similar charge rate as using the included charger that came with my Pixelbook. It does get rather warm while in use, but that was to be expected. All of the ports (1 USB-C and 2 USB-A) quick charge my QC 3.0 phones. It fast charges everything I hook up to it. I can charge the Pixelbook about 1.5 times with this battery. This battery charges pretty quickly when connected to my 45W Pixelbook charger. If I'm only charging my phone with this, I can recharge my phone 3 or 4 times from a single charge. Add to that the dual use of this battery backup as a USB hub, and it's an all-in-one solution for any Pixelbook owner. Switch it to hub mode, and connect 2 USB-A devices to your Pixelbook.Great build quality, and comes in premium packaging. Also includes 2 short USB cables in the box. 1 USB-C to USB-C, and 1 USB-A to Micro USB (with a Micro to USB-C adapter). Comparatively, this is an expensive battery backup, especially considering the size 20,000 mAh, but the cost is outweighed by the awesome capabilities that this battery backup delivers.Prior to this battery backup, my main backup was a RavPower Turbo+ Series 20100 with USB-C and QC 3.0 (pictured). As you can see this ZMI is shorter and thinner than the RavPower. This ZMI does everything the RavPower can do, and more (hub mode)! Best battery backup for the Pixelbook, by far! I've been able to replace 2 devices: the larger RavPower battery and a USB hub with this ZMI battery/hub, which really helps while travelling.Note: I do not have a MacBook or MacBook Pro, so YMMV

I got this to charge my surface pro 7 on the go. It comes with a USB c to c cable and works perfectly.Highly recommended.