BaseusPower Bank, 20000mAh 65W Metal Laptop Portable Charger, 4-Port USB C Battery Pack, PD3.0 Fast Charging Battery Bank for MacBook Dell XPS IPad iPhone 15/14/13/12 Pro Samsung S23 S22 Steam Deck

I have a 2-year degree and 4 years of experience in IT + paid attention in my electronics class in high school, so you could say I'm a certified nerd. I've only had the Baseus power bank for a few days now, but the performance is extremely solid so far and I recommend it.Chances are you're just here in the reviews to check if it's a scam. So here's the part you care about:The energy capacity is advertised as 74 watt-hours. I ran an endurance test with a load of ~10 watts (5v2a as reported by the battery) and it lasted 6 hours and 10 minutes, for a usable capacity of ~61.7 watt-hours. This is normal, all batteries lose some of their output as heat. The battery says it has an energy conversion rate of >=75%, and my unit had an energy conversion rate of ~83.3% in my testing (usable wh / battery capacity).Pros:1. The battery capacity is actually as advertised, which can be hard to come by on this platform.2. The built-in display is great for superusers. Where every battery bank I've used before just shows its charge percentage, the display can be toggled between that, amperage, and voltage - all three of which work while charging or discharging. The display is 7-segment with red LEDs at a gentle brightness.3. The build quality is great. Feels sturdy enough to use as a weapon in a pinch.4. It supports simultaneous charge/discharge, though my testing couldn't tell me how much power it provides whilst charging as I don't have the necessary equipment to measure it, and the output voltage/amps doesn't show on the display while it's charging.Cons:1. When a device is connected to or disconnected from the battery, the power is briefly stopped and restarted on all ports, causing attached devices without their own battery to shut down.2. When a connected device completely stops consuming power, the port is shut off until the device is unplugged & plugged back in, or the power button is pressed. And I do mean *completely*, even a fraction of a watt seems to be enough to keep it on. This triggers con #1 as well.So if your use case for this battery bank includes powering devices that don't contain their own battery, be aware of these caveats and have a workaround in mind. I still recommend this battery bank.In my case, I got this for an electronics project, and I was powering a Raspberry Pi 4b (USB-A) and two 64x32 LED arrays (USB-C). Whenever I'd stop sending an image to the displays, the port would shut off due to no power being consumed, and the Pi would lose power for just long enough to reboot as well. Using a USB-PD trigger board to power both the Pi and my matrices off of the same USB-C port proved an effective workaround.(Just in case this review reaches someone else trying to do a similar project, you'll want a DC buck converter as well so you can get more than 15 watts out of the USB-C port at 5 volts. I plan to add one later)

Great value, plenty of ports, not too heavy, great battery life

I bought this power bank on December 2023. Went to a Europe trip last June 2024 and the power bank started to give troubles. For example, I charge it to 100% and disconnect it from the wall power outlet. The next morning I wanted to use it and after connecting my Samsung Galaxy S23 Ultra to the usb C power bank's port it didn't do anything, not even the side button to check the charge worked. So I have to connect it again to the wall power outlet, it would show 100% battery charge and after that it would charge my phone. But come on, why would I use a power bank the needs a wall power outlet to iniciate its functions even tho it has 100% charge on its own? Where am I supposed to find a wall power outlet in the middle of nowhere during a day trip? It completely fails it's functionality.Now, after 9 months from usage, it just won't hold it's charge at all. Two days ago it was fully charged and just resting inside it's case. Today I was going to use it and was completely discharged!!! I pushed the side button to check the charge left and it shows 0%. Again I connect it to the wall power outlet, it reboot and started to show 70% battery left after just 3 seconds of being connected to a wall phone charger. You can see it on the attached picture, the product even have the transparent decals from being new.Power banks should not work that way. This product is expensive and won't last even a year. You better search for another brand and save your money!!I would like to see what the brand warranty policies are going to offer now...

It can fully charge a laptop and still have a little bit of energy to spare Or charge your phone several times. And it looks good.

UPDATE: The replacement product arrived in good condition and worked well out of the box. I bought it to charge my Dell Inspiron 5406 laptop, which it does pretty well over USB-C at about a 1% laptop charge to 0.8% depletion ratio, if charging only the laptop. Running an active virtual meeting while charging increases that to about a 1%:1.2% ratio. Was also able to fast charge my phone via USB-A simultaneously with no issues. Unplugging the phone stopped charging the laptop as other reviewers said, but a quick unplugging/ replugging of the cable at the power bank got me going again.Looks quite sleek with a solid, premium feel. I got the blue because it was cheaper for some reason but I love the shade, and I'm a very black and grey kinda person. It's bit on the heavy side though, and I don't get the sense it would survive any kind of fall. That's the only reason it didn't get a full 5 stars really. The LED is quite nice, allowing you to switch between battery charge %, voltage and amperage. Tech Support was also very responsive and communicative.All in all a very good buy for the price I think.UPDATE: Reached out to Baseus Tech Support and got prompt responses with extensive troubleshooting steps. Ultimately they decided to replace the product. Awaiting delivery. Will review fully when it arrives...FIRST EXPERIENCE: Worked well out of the box. Was charged to 75% so I charged it all the way to 100% then used it to charge my laptop to 50%. It ran down to 53%. Now when I plug it in to recharge it or charge anything else the LED just blinks on 53%.

Works well. I use it for my asus rog ally X

Still works great years later!