My review of this power pack. I ordered this power pack on April 24th and it arrived on April 26th. In the package, it comes with the power pack and charging cable only. The cable is a USB-A on one end and a micro USB on the other and is a whopping 12” long. The power pack has two power input ports, a USB-C and a Micro USB. It also has four power output ports, sadly all of them are USB-A so no USB-C output ports. It does not come with a wall charger, but I have a 20W USB-C wall charger and a six foot USB-C to USB-C cable which combined, works quite nicely. I purchased this power pack primarily to power my Go Pro camera while I’m recording my motorcycle rides. I was tired of the camera dying on me in the middle of a ride. Right out of the box the power level was 15%, so the first order of business was to charge it up. So I plugged it into a USB-C 20W wall charger. This was around 5:00 p.m. By bed time the power pack had only reached 52%. When I got up the following morning at around 5:30 a.m. it was showing 100% so I’m guessing it took about 12 hours to go from 15 % to 100%. Now it was time to see if it would perform the way I wanted it to. My camera was sitting at 99% when I turned it on. I connected the power pack to one of the charging ports on my camera and pressed the record button. I just wanted to see how it would perform during normal recording use. I started the timer on my cell phone and after 3 minutes I checked the power pack and camera. The power pack was still displaying a 100% charge and the camera was still showing a 99% charge. So far so good. Next I disconnected the power pack from the camera and continued recording. After another 3 minutes I again checked both power pack and camera. My camera had dropped from 99% to 95% and the power pack had turned itself off. Pressing the power packs power button showed it was still sitting at 100%. Next I want to take a motorcycle ride to confirm how this power pack will function in real world use however the weather is currently not cooperating. I will continue my testing and this review in a few days. Pending…… On April 29th, I took this for a test ride on my motorcycle and it worked perfectly. I kept it zipped inside the pocket of my riding jacket with just the charging cable running from it to my camera. When I started, my camera battery was at 86% and after recording for about an hour, the camera charge was still sitting at 86% while the battery pack was sitting at about 95%. That’s plenty good enough for my purposes. In my opinion, this is well worth the price. They do sell USB-A to USB-C adapters which would probably work to connect a USB-C to one of the power output connectors, but I didn’t try that myself.

First off, it's a big battery. It's heavy and bulky. Can you carry it around? Sure. It's a bit large but fits in a pocket or hoodie pocket just fine. Definitely wouldn't be comfortable lugging it around for a hike but fits in a backpack fine as well. People saying "not convenient for hiking" yeah? No duh, why would you bring this hiking. Firstly, you're hiking, you probably don't have internet to begin with, so your battery shouldn't be dying that fast anyway, and second, why would you NEED a capacity this high for hiking, bring a smaller more convenient battery pack. Keep it in your backpack. Don't complain about the size when it's quite obvious it's going to be large and bulky. Durr. For my opinion. It's a good battery, it hold a humongous charge that lasts days. I see this as being perfect for road trips where you don't have to worry about holding it, just sit it in a cup holder or something and let it charge. No duh it takes a long time to re-charge it's 38k mAh. BUT it's not even that long. I saw reviews of people saying it takes FOREVER but never gave an actual time of charging. I charged it from dead and it took maybe 3-4 hours. Which is REASONABLE for 38 THOUSAND mAh!!!! Obviously it's going to take long to charge. [EDIT]: the product is not advertised to fast charge, but you can get it to fast charge by using a higher capacity wire. The wire provided with the pack will not fast charge due to its limitations but you can buy a higher capacity charging wire for a few bucks here on Amazon. After using the new wire for a few days it fast charges just like the original plug that came with my phone. So I recommend buying a fast charging wire if you don't want to wait 8hrs to charge your phone. TL;DR It's big and bulky and not comfortable to lug around in a pocket, but it holds charge for days with multiple uses, it takes a bit to re-charge but it's a large capacity so be patient. It does the job and charges the phone in reasonable amount of time. It isn't advertised as a fast charging device, but for the price compared to other brands it's good at what it does. And what it does is charge your device.

This is a great battery. I recently took it to Asia for a 3-week business trip and was pleased with the performance. A few things that you should be aware of before you buy: 1. This battery carries a lot of power, therefore it weighs more than most of your slim battery packs. It's not something that you would want to slip into your pocket for a day of walking. If you are looking for something suitable for this, find something a little lighter. 2. This battery is also much thicker than the smaller battery packs that I have. Again, not great for slipping into your pocket. I kept mine in my backpack or a fanny pack (I know) and I didn't have issues at all with taking it with me. 3. Because of the power in this unit, it takes time to charge. When the power started to wind down, I made sure to give it a charge overnight. This isn't a battery that you can charge in an hour or two. It takes a good amount of time to charge. Great things about this battery: - The battery life is incomparable. It lasts forever. I never felt like I was in danger of using up a full battery in a day - regardless of what I did with it. - The screen gives you an exact, numerical, representation of the current battery power remaining. This is so much better than the 4 or 5 light systems. - If you need it, the 4 full-sized USB ports are a great asset.