Is not top of the line powerbank, it takes like 7 to 8 hours to fully charge, however it quick charges a Samsung note 9 or a oneplus 8, I don't have a way to confirm if the powerbank is 20000mah however it charged my phone 3 times a little bit more so pretty much does a good job, you can charge it during night and have extra juice for your phone or tablet during the day. Size and weight..

I always worry about charging my phone when camping in case someone needs me. This charger worked perfectly. I charged my Galaxy Note S10 twice and my Samsung Smart Watch twice. It still had power when I got home from my 4 day trip. Well worth the money spent

Absolutely love mine. Worked well on my trip to AZ. Kept me and my family fully charged daily on all devices- 3 phones, 2 iPads and 4 air pods.

1. The initial charge will take 7-8 hours. 2. You can't charge 2 things at once. 3. It's too heavy to carry around in your purse, but will be great for long trips / travel. 4. When not in use, unplug everything, otherwise battery won't last. Once you get it fully charged and get used to it, it's worked great. It's super sturdy, and will easily charge your phone fast in a bind. I'm very happy with the purchase.

It is a solid battery with fast charging. I always trust xiaomi brand more then unbranded batteries.