Nice, compact unit, excellent for travel.

I've only used it once for a top up.
Decent enough.

I saw this one on sale and needed to upgrade my older Monoprice power bank (which still worked great after 5+ years). It's smooth and sleek with a cool LCD digital display. Perfect travel companion or just hanging out by the pool.

I had some difficulties with this device. I initially tried to charge it with Google High-Rate Charger via the USB-C I/O port. It would not charge at all. Then I tried charging it via the micro USB port. It appeared to accept a charge but at a very low rate (approximately 50 mA). Then I charged it with a 2.1 A 5V charger vie the USB-C port. It then charged fine at a rate of about 0.9 to 0.5 A. It took several hours to charge but that's OK. It must have some kind of handshake with the high-rate chargers that disables charging. Would be really nice to be able to charge it faster.. I do like the display. I am unsure about the function of the on/off switch. It appears to accept a charge or provide a charge regardless of whether I switch it on or off.

it's an okay charger but one thing I should have looked at more closely is the fact that it only charges to a max 20W, even when using one port. Which isn't enough to charge anything larger than a smartphone. I guess that explains the lower price.
otherwise so far so good. it's relatively lightweight, I like that it has a display and 3 different USB outputs.

Like the compactness of the charger. Power button is hard to find since it is all black. Cannot store a full charge for long and discharges on its own, without charging devices, faster than other power banks I've had. Not sure if this is normal.

Charges just a good as using the typical wall charger. The % of power is useful to help determine if you have enough power left to accomplish your charge. Used just over 50% to charge a S21 FE.

Pro:
* Supports charge-through; This pack can charge itself and power a device at the same time. NOTE: if trying to use this as a UPS, the output turns off momentarily (guessing half a second) when external power is added or removed (true for both micro-usb and usb-c charging inputs)
* Powers my phone while playing games all day (6 hours)
* Slim thickness fits in your pocket or bag easily

Con:
* Minimum turn-on current seems to be 0.10-0.15A. It will not turn on when I use a small "bookmark" light. You can turn it on by plugging in something larger first (like a phone) then switching to the light, but that's inconvenient.
* Because of the minimum turn-on current, after my phone reaches 100%, the battery pack turns off. So then I need to unplug and replug the phone to keep the charter going.
* No way to check pack charge % without plugging it into either a phone or a charger.

Note that the turn-off current is lower than the turn-on current (hysteresis), so my small bookmark light won't activate the pack, but happily keeps it running (tested for 3 hours)

I was looking for a lightweight power bank for backpacking. This was perfect for the application! With the 2 short cables (Monoprice brand also) I'm at 6.5 ounces!

Made a great gift; very compact and lightweight.
A small fraction of the size of my older 10,000 mah model.