I got some of these from a previous meh. I’d say they are meh, but can’t go wrong at $3 (mine were $4 which was also fine).
The built-in cable is cute. It fits both lightning and micro usb. Part of the hassle of power banks is often trying to find the right cable, so this is great since my family has both micro usb and iphone users. It does come with a usb-C adapter but that’s a little fiddly thing that can easily be lost, so that doesn’t count as part of this pro.
It’s sort of an ok form factor for a large phone like an iphone 8+. I can’t stick it onto my medium sized phone without blocking the camera. On smaller phones the power bank will stick out over the side.
It’s cheap even by standards of those single cell 2000mah chargers.
Even if it’s useless as a powerbank it might be useful to open it up and scavenge the internal lipo cell for some other purpose. I might do that with one of mine. It’s still cheaper than buying a random lipo cell.
I’m skeptical of the 4000mah capacity but it does seem to supply a reasonably good single charge to a phone. I will try to measure the capacity somehow someday
If you leave it plugged into the phone after the phone is charged, the power bank itself gets drained suspiciously fast, like its internal electronics are burning power. I left my phone plugged into it overnight and in the morning the power bank was empty.
The suction cups won’t stick to a phone that doesn’t have a flat, smooth surface. My phone is textured plastic so it’s not so great.
Even with the suction cups working, the phone and powerbank bundle is somewhat thick and unwieldy but it’s still ok.
It uses a right angle plug that won’t fit into the charge port of certain weird phones because one edge of the port is obstructed. This could be worked around with some kind of cable adapter but it doesn’t seem worth the trouble. There is no normal USB-A output.
The charging input (for charging the power bank) is micro-USB so you can’t charge it if all you have is an Apple (lightning) charger.
It weighs around 150g which is a bit heavy compared to the single-18650 chargers which are around 90g depending.
Anyway, $3 or $4, can’t go wrong. Above $4 would be a meh.
Today i noticed a burning smell. Realized it was the charger that was connected to my phone unused for about 20 to 30 min. I disconnected and found a melting area on both sides near the letters and lights area.
Please use caution with this product. I have used this all week without prior issue.