2pcs 22.5W Power Bank Bidirectional Fast Charging Mobile Power Module Circuit Board with Digital/Light Type-C USB Suppor PD/QC3.0 2.0（ Single C Port Light）

These are perfect for building your own battery power supply or adding a charging circuit to an existing project. These have a female USB-C input/output connection as well as overcharge protection built in. They also have a temperature sensor to shut down charging in case of overheating.I've used one so far, and it works quite well with a bank of two 18650 batteries in a Raspberry Pi project.

This pair of 22.5W power bank (bidirectional) fast charging module comes with no instructions on how to use it. Which makes using it frustrating. The markings on the IC used by the module are abraded off, so that the chip type can not be determined by inspection. The module has five LEDs and a push button switch. Using the internet, yielded this information about the function of the switch that is located on this module. “A short press on the switch opens the USB port for external discharge. A double click action closes the USB port (i.e., turns module off). If there is an external power supply present, only the output port will be closed.” Four of the LED’s seem to indicate battery charge. The module comes with an NTC sensor for use in preventing over-temperature.When I attached an 18650 cell to the battery leads of the module, it seemed to only charge it up to 4.07V, which is lower than I would have expected (4.2V is full charge voltage). When current was pulled from the USB port, which had a no-load voltage of 5.1V, the unit shutdown with a current pull of about 0.5A, which again seems low. The module might require multiple cells in parallel to allow reasonable current draw.With no instructions, the issue might be that I am using it wrong. However, as it is, I am not impressed. I would pass on this module.

Works well, pretty much exactly how you would expect a commercially sold usb power bank to work. So far in my testing i've noticed no issues. The module detects a battery automatically. A single button press will show battery charge and turn on the usb-c port if its in sleep mode. Standard 4 led battery gauge.It auto detects when a usb-c device is plugged in and starts charging. Integrated temp sensor via the thermistor (those small black wires).Very nice, clean power bank module. Only wish is that it had some better mounting holes. It has cutouts but i prefer entire holes. But overall great module!

If you are buying this to build a power bank for iPhone, it won't work unfortunately. The board simply turn off and locked up unless you plug it back into power supply. it does work for the rest of the device

DWEII 2pcs 22.5W Power Bank Bidirectional Fast ChargingI have a plan that involves using 18650 batteries to make my own USB power pack for a project that I am working on, so I needed a way to regulate the power, and have USB I/O. These boards allow for both in a small package. My preliminary testing concluded that these will function for the needs of my project, though the lack of documentation provided in the listing leaves a couple questions unanswered…. Do they support passthrough charging? Is the probe a temp sensor (appears to be)?

These power modules work well for building custom power banks. The bidirectional fast charging is a nice feature, and the digital display makes it easy to monitor. I’ve tested it with PD and QC3.0 devices, and it charges efficiently. Solid choice if you’re into DIY electronics and need a reliable charging board.

If you have unused 3.7v battery cells or 18650 elements, this module is the fastest way to turn them into rechargeable power banks. It supports several fast charging protocols. Tested with a samsung phone, it reliably output 15W fast charging power. The controller can output 22W, sufficient for large phones.This little module comes with a charge/capacity indicator a it even included a temperature probe for charge optimization and to prevent overheating.Dual-output (USB A & C) is also convenient.Update: unreliable at capacity detection and at delivering power. Sometimes works, sometimes does not. Occasionally detects half-charged 18650 battery as 100%, refuses to charge. Rating dropped to 3 stars.

Looking forward to using this in some small projects, will likely use it with 18650s in parallel as a small power bank.