Baseus Power 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 use this thing for my Steam Deck OLED, and starting the day with a full charge on the deck and the power bank, I can spend basically the whole day and still have at least 20% left on the power bank. Using a case for the steam deck that allows you to mount a silicon strap, this bank makes the Steam Deck about 3 and a half pounds (pretty heavy), but that's a given result when you buy a whole battery pack.

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)

I have ordered two of these battery banks. Each one has come to me in a discharged state. Neither one will take a charge. Some product videos on this product page detail this exact situation.Press power button and the display does not come on.Connect to charging station and display comes on but flashes.Wait for battery bank to take charge and screen reboots and flashes rapidly.Battery bank continues this boot loop cycle.Once a battery pack reaches zero and the power reserves, reserved for power control logic reaches zero battery bank becomes a paperweight and is not recoverable.So long as battery bank remains in active use and is being charged regularly and you were lucky enough to get one in a charged state it will continue to work for you. If you receive it in a discharged state or allow the battery bank to sit for an extended period of time while dead or near dead, eventually it will reach zero charge and become unrecoverable.Battery bank when not in use has a low power draw that will over time deplete any energy reserve in the battery bank to zero. This includes ones not shipped yet and sitting in warehouses. If you get one in a fully dead state and the screen reboots 2 or 3 times + return it. It will not take a charge.If it only reboots once while at zero charge, watch it for an hour. If it starts to take a charge you may be lucky and it may be salvageable. However due to the low/dead battery condition, it may hurt the total battery life of the bank.

This power bank is actually not that bad at all. I had it for my Lenovo Thinkpad for mobile music composition but couldn't afford it just yet so have to buy another later. Very very good price for what it was capable of. I even plugged my small Chromebook 35 watt USB C charger into it and there it goes. Power up in no time! You press the side button one time, battery charge percent. A second time, charging voltage. A third time, and it'll say the charging rate in "amp hours". Usually best up around 2.0-ish .. When (not if) I get it again I'll probably buy a second one to go home and swap out and head back out. The portability is great. Not too heavy. The build feels solid. I didn't feel like if I banged it around over it's lifespan the side panels would pop off or anything. The USB C port is for charging the power bank as well as it charging something else. Includes a micro USB port as well but I'd recommend the USB C port. Capable of faster rate of charge. That's why I mentioned buying two so I wasn't rigging it to charge and be able to charge in whatever way. Two other USB A "standard" ports included which of all are reasonably marked with their abilities of electricity handling on the actual bank itself. Also I wouldn't call it "water resistant" (not sure if it was advertised as so) but the output isn't high enough to make me not want to bring it home in the rain or anything, in my backpack or whatever. Will be buying in the future again. Thank you.