🔌 Onyehn 10Pcs 5V Boost Step Up Power Supply Module with Lithium Battery Charge Protection Board - HOTCHIP HT4928S DIY Charger with LED Display, USB and Micro Port (10 Pack) Review

They seem to work for what I want. My only complaint is that one of the boards was cold soldered and the small coil fell off rendering the board unusable. Tested on a 4000mah Lion cell I got 5.01VDC at a 0.2A load. I also checked the charging side but they seem to be working as advertised. Otherwise there were no problems with it, delivery is fast!

As others have said, the quiescent current is 10uA and charges the lipo battery at around 700mA. The device gets pretty hot when discharging and will melt the hot glue I used to attach it to the 18650's mount. However, if the current draw drops below 60mA the boost converter will go to sleep and not recover. This causes low power devices like the ESP32 to lose power when they go to sleep.

I found that charging stops at around 4.10-4.15V too soon (I score 3 out of 5 on this purchase). The charging current was about 700mA. The idle current is 11.5 µA with a battery voltage of 4V. The micro USB connector, which should be an input, outputs 5V when the board is connected to the battery. Update 08/27/2018: I bought it again because I was looking for a small board with a 5V Li-Ion amplifier and Li-Ion charging function. I couldn't find any in this size.

5V charger, ideal for changing batteries. When you need to connect a power supply, the charger disconnects the USB load for a split second, which restarts devices like the Raspberry Pi, Arduino, etc. As such, this may not be ideal for portable SBCs such as the Raspberry Pi, where mobile use is preferred. I was able to get this to work in parallel, meaning the battery and two of these devices are set up in parallel, one of the boards connects to a mini-USB for charging, and the board connects to

Yes! It works as a 3.7V DC to 5V DC boost converter and under ideal conditions also charges 3.7V Li-Ion batteries with a capacity of around 700mAh. The battery undervoltage cutout appears to be 3.2 VDC before the 5 VDC output stops boosting. The only caveat is that the load must be drawing at least 60mAh at all times for the boost converter to keep working. This can be a problem for low power applications. This is one of the main limitations of this design. Under actual load conditions, the…

First off, this review is all about the Onyehn 5Pcs 5V Boost Step Up. The main difference from the product description is the presence of a CHIP on the board, it's not 134N3P, but HOTCHIP HT4928S. And there is no blue LED on the board, so don't chase it. The RED LED is marked as LED 2 on the circuit board and the positions of LED 1, LED 3 and LED 4 on the circuit board are free. Pin 2 of the HT4928S connects to LED 2, blinks to charge and stays on to complete charging. Pin 1 of the HT4928S is…