JUOVI Laptop Power Bank 20000mAh 90W USB C Portable Charger，PD QC Fast Charging 4-Port(2C+2A) External Battery Pack for MacBook Laptop iPad iPhone Samsung Steam Deck, Perfect for Travel & Business

Amazon CustomerUnited States

Reliable Power Bank, PPS and PD Support, Full 74WH for 20,000mAH Power Bank

I got this JUOVI 90W power bank because a few of the listing details impressed me given the price (currently $53). I use power banks all the time because I like to work outside on my deck, or in my fave chair which is next to a window wall with no nearby outlets. The listing promises decent features for the price, especially dual 90W USB C ports. The TLDR on this is that it's a decent power bank, although it didn't deliver on everything perfectly, it's still pretty good. ➡️ THIS ISN'T GOING TO WIN ANY DESIGN AWARDS, BUT THE BUILD IS GOOD, IT FEELS DURABLE AND WORKS FINE This power bank feels sturdy and has a clean matte finish that resists fingerprints. The display is bright and is pretty easy to read, and the ports are spaced well. At 14.1 ounces, it weighs roughly the same as a normal can of soup. It’s not a pocket power bank, but it’s a comfortable size for my pack and I can easily take it on a plane. The overall build is practical, reliable and straightforward, like a sturdy pair of shoes. ➡️ DICIPHERING THE USABLE POWER OF POWER BANK MARKEING MATH The first thing I do, even before I order a power bank, is calculate the Watt hours. Watt hours (WH) measure the actual stored energy in a battery. mAh only describes capacity at one voltage, and that voltage changes once the power bank boosts it to 5V or 20V. WH stays consistent across all voltages, so it’s the only number that reflects real usable energy, which is all I care about. ➜ It’s worth doing the quick math because manufacturers don’t all use the same assumptions, and a “20,000mAh” power bank can range anywhere from the low 60WH range to the mid 70WH range depending on the cells inside. ➜ The specs printed directly on this power bank include: - Internal pack: 6670mAh at 11.1V - Total energy: 74WH - Rated capacity: 13000mAh at 5V ➜ Without conversion losses, the usable energy for this power is a full 74WH (calculated as mAh × volts ÷ 1000, or for this power bank 6670 × 11.1 ÷ 1000). ➜ With conversion losses, the real usable energy on this power bank ends up between 53WH and 65WH depending on load (aka the power being delivered to the device being charged). ➜ 65WH ends up being pretty close to my own testing calculations, which is actually pretty good. - My 14 inch MacBook Pro doesn't get get a full charge - Both my Samsung Galaxy phone and my iPhone charge 3 or 4 times. - My Steam Deck gets 1 full charge with room to spare. ➡️ HOW THIS COMPARES TO OTHER 20,000mAh POWER BANKS ➜ Most 20,000mAh power banks fall somewhere between 60WH and 75WH once the real numbers are calculated. Lower end models sit near the bottom of that range, while better ones land in the low to mid 70s. ⭐ This JUOVI power bank comes in at 74WH, which puts it at the high end of what a 20,000mAh pack can realistically deliver. ➡️ PORTS AND CHARGING ARE GOOD, EITHER USB C PORT CHARGES AT 90W, BUT I DON'T LIKE THE TRIAL AND ERROR OF MULTIPLE CHARGING PORT BEHAVIOUR There are 2 USB C ports and 2 USB A ports. Each USB C port can reach 90W when used alone. Importantly both USB C ports support USB Power Delivery (PD), which is the fast charging standard used by iPhones, iPads, Macs, and many laptops. PPS sits on top of PD as an optional mode, so both PD and PPS are included. ⭐ Not all power banks support both PD and PPS, so I like that this one does. ➜ The combined port output rules aren’t documented, (the product description I think is purposely vague) but testing shows the following: - Either single USB C port can reach the full 90W - Once multiple ports are active, wattage drops so if you need 90W, use one of the USB C ports and don't plug anything else in. ⚠️ The total combined output is not stated anywhere. Reputable brands almost always list this because it matters for real‑world use. I'm disappointed that this isn't listed, so I'm on my own for trial and error with this when I need to use more than one port, which isn't optimal. ➡️ EVEN WITH THE MULTI-PORT CHARGING AMBIGUITY, THIS STILL PERFORMS WELL I like that this charges both my iPhone and Samsung phones quickly, my iPad at full speed, and in a pinch, my laptop well enough to keep it running if needed. This consistently delivered 86W to 90W when charging my laptop, and the power bank didn't get too hot so thermals are good so far which keeps the charging speeds up. ➜ This recharges itself at 65W. A full recharge takes about 2.5 hours. Pretty good actually. ➡️ THE TRICKLE CHARGE IS A NICE FEATURE THAT NOT EVERY POWER BANK INCLUDES If you've ever had trouble charging a device with a USB C cable and wondered why some cables work and others don't, it's usually a trickle charge issue. Trickle charge is handy for earbuds and small devices like portable lights. ➡️ WHAT STANDS OUT TO ME ABOUT THIS POWER BANK, BESIDES THE TRICKLE CHARGE A few features surprised me given the sort of "standard" look of this power bank. ➜ This really does deliver 90W on a single USB C port. That makes this capable of keeping my laptop alive if I need it. ➜ The PD and PPS support is great, and means that both my Samsung devices and my iOS devices charge fast and safe. PPS at 90W is especially impressive. ➜ This really recharges at 65W. Some power banks say they do, but really don't. This one passed my testing. ➡️ WHAT SURPRISED ME WHEN I GOT THIS THAT I HAVEN'T MENTIONED ALREADY The specs on the box itself are confusing because they are different to what is printed on the power bank or the product details in the listing. I included a picture of the box, although several items on it are incorrect. ➡️ IS THIS A GOOD VALUE? At the current price of $52, this is a decent value for a 74WH power bank that delivers real 90W output, full PD support, and better PPS performance than expected. Most power banks with this feature set cost more. ➡️ THIS IS A GOOD TRAVEL OR GO ANYWHERE CHARGER. This is a strong option for anyone who needs a reliable high output power bank and isn't really worried about aesthetics. It's great for travel and can be take on flights. It’s not really stylish or ultra compact, but it’s built to deliver power, and it does that well.

Canadian reviewerUnited States

It's exactly correct

One of the strange things from this product is that it has a UL Energy verified logo on it. This is normally used for things like air conditioners. Maybe it's a certification that it has the capacity it states. Juovi is more honest than most in that regard. It's a 13000 mAh 5v battery, but most batteries are rated at 3.7 volts, which brings it to around 17k. Not 20k. But, some batteries are lately rating them at 3.2 volts for some reason, so at 3.2 volts, this does equal 20k. They're upfront about it, which is good. You know the exact capacity - some places don't give you that and you're wondering why the 10000 mah power bank only charged your phone to 70% and died. Not this one. I don't think the UL logo means it's safety certified, but it seems to be roughly safe. I power cycled it a few times from 100 to 0 and it seems to turn off and talk with cables correctly. It doesn't force too much power through cables that shouldn't have it, so make sure you have a certified cable when trying to do 90 watts. Some cables might do 90 watts with some power banks, but other power banks will only send it through cables it's reasonably sure will do it. I did get 90 watts out of this power bank - in fact, I got more than 90 watts. I charged my Jackery and got 86-88 watts the whole time, but the Jackery reports about 10% less than it actually gets, so it was likely charging at 92-95 watts. The Jackery charged the Juovi at the stated 65 watts, or, more accurately, 70 watts according to the Jackery which underreports by 10%. When I was charging my Jackery with this, it was difficult for them to negotiate which one was which on the USB-C side, so they just both did nothing. If you're in a situation where you are using this power bank to charge another power bank, either use USB-A, which will work, or, you can do what I did, which is use a barrel plug adapter which makes the second power bank look like a dumb unit that will only accept power. Anyway, I was impressed that this power bank is so honest, hits its specs, and is reasonably priced for the power output it provides. Very impressive.

Amazon CustomerUnited States

A Reliable Travel Companion with Serious Power

I've been using this power bank for a few weeks now and I'm genuinely impressed. With a total capacity of 20,000 mAh (rated at 13,000 mAh at 3A output), it has enough juice to charge my smartphone two to three times before needing a recharge itself — which is exactly what I need for long travel days. The four ports — two USB-A and two USB-C — give you plenty of flexibility to charge multiple devices at once. The 3A output on all ports means fast, reliable charging, and it handled my laptop without breaking a sweat. The power specifications are printed right on the side, which is a small but thoughtful touch that makes TSA screening a breeze. I especially appreciate the digital display that shows the remaining battery percentage. No more guessing games — just a quick tap of the power button and you know exactly where you stand. The display also lights up while charging, which is handy in low-light situations like a red-eye flight. One honest note: this thing has some weight to it. It's not something I'd toss in my pocket for a casual day out. But for travel — especially air travel — it's a game changer. No more hunting for outlets at the airport or rationing your phone battery on a long flight. It charges itself quickly when paired with a high-wattage adapter (I used my laptop charger and it topped off fast). It comes with a USB-C to USB-C cable included, which is a nice bonus. Just be aware it doesn't support wireless/magnetic charging, so you'll need your own cables for other connection types. Bottom line: If you're a frequent traveler who needs dependable, high-capacity charging for phones, tablets, or even a laptop, this power bank delivers outstanding value. Highly recommended.

Pete SUnited States

Fast charging

This charger is fast, rated at 2.0. My phone accepts up to 65 watts of wired charging and this power bank chargesymphone very quickly. With the high capacity, I can get at least three full charges on my phone. Although this might be a bit bulky, it's not as bulky as the older 20000mah power bank it replaces. It's got a sleek design and the led display is nice, my older one does not have this. It has four outputs, two USB A and two USB C. The USB C ports are also for charging the power bank. It works perfectly for me and is my new travel power bank when not flying (power bank larger than 10000mah are not allowed on flights) and I'm travelling with it now as I wrote this review.