Xiaomi ZMI No.20 210W 25000mah USB PD Power Bank QB826G, Backup Battery For Macbook/macbook Pro/Pixelbook/Nintendo Switch

most power output on the market right now!

Good quality.

I had the ZMI15000 mAh charger and with PD, can charge a macbook while traveling. This is an upgrade. Good brand and product. Used to be marketed under Xiaomi.

Incredible charging power, limited controls

I was not sure about the pack, as I didn't know the company, and was impressed by the charging tech of this device. It's able to negotiate maximum power for charging and being charged over USB-C PD, and is one of the few devices I own that can power high-end laptops like the Macbook Pro and Thinkpad X series. I was amazed when I first used it to top up my MBP M1 max 16", it went from 50% to 100% in less than an hour, and the ZMI still had 40% after that.It also handles low-power devices like smart watches and headphones, it has a special mode for that. When connecting it to another power bank (like a larger battery) you can't tell it wether it should charge or be charged - it seems random and you have to reconnect a lot until it does what you want. By contrast, ... MoreI was not sure about the pack, as I didn't know the company, and was impressed by the charging tech of this device. It's able to negotiate maximum power for charging and being charged over USB-C PD, and is one of the few devices I own that can power high-end laptops like the Macbook Pro and Thinkpad X series. I was amazed when I first used it to top up my MBP M1 max 16", it went from 50% to 100% in less than an hour, and the ZMI still had 40% after that.It also handles low-power devices like smart watches and headphones, it has a special mode for that. When connecting it to another power bank (like a larger battery) you can't tell it wether it should charge or be charged - it seems random and you have to reconnect a lot until it does what you want. By contrast, power banks like the Sherpa 100AC let you control what direction (IN/OUT) you want.I was a little annoyed at how little control you have though. There's a single button and a number display. When it's charging or being charged, this display blinks, and the bright white digits will light up a whole room. I ended up placing several layers of tape over the digits so the flashing lights don't disturb sleeping people.I would recommend this unit, it's well-made, and one of the few units on the market right now with such a high capacity and charge output. After a couple of weeks of use it has become a key part of my daily travel/work kit.