What is Reddit's opinion of MakerFocus 6pcs 2A 5V Charge Discharge Integrated Module 3.7V 4.2V for 186 50 Lithium Battery Charging Boost Mobile Power Protection PCB Board Module?

From 3.5 billion Reddit comments

I question whether the PSU can actually deliver the rated 5v @ 3A on the 5VSB line. PC PSU vendors have a history of overstating their products' abilities. Have you measured the current the RPi is pulling?

Also, where are you measuring the voltage? At the PSU or at the RPi? Is your wiring up the task of delivering 2.5A (i.e. are you running it over 30' of 30AWG wire)?

Another option might be to give it a surge tank. Can you incorporate a Li-Ion or LiPo cell with a 5v LiPo charger and 5V USB output? A setup in the same vein as this board (though not necessarily this one since I don't know if it will perform well enough, but you get the idea).

Please bear with me as I'm a novice/hobbyist. So I ordered the following charge/discharge module from Amazon to allow for USB-C charging of a Gameboy Color:

Product listing

What I'm noticing is, in order to power the device I have to switch on the Gameboy Color and press the "Key" button to "wake up" the board. It does not seem to be able to "wake up" from simply switching on the device. I also noticed that when I go to charge the battery I have to have the GBC on and running for the charge circuit to work properly, otherwise it simply generates a ton of heat without the battery actually charging.

Another interesting note is there is a boost circuit on this module to pump it up to 5v, but that's not entirely necessary as the GBC can run on as low as 2.4v or as high as 6v. So if that's causing issues I'm wondering if the boost can be disabled?

Are there any solutions to the situation I've described? Do I need to modify the charging board or add additional components to the circuit for it to function properly? Is there anything else you all need to know?

I’m wondering if the 4056 used with something like this would add over charge protection? MakerFocus 6pcs 2A 5V Charge Discharge Integrated Module 3.7V 4.2V for 186 50 Lithium Battery Charging Boost Mobile Power Protection PCB Board Module https://www.amazon.com/dp/B07PZT3ZW2/ref=cm_sw_r_cp_api_glt_i_N05Q4KZ52HJQSAXY1DPJ?_encoding=UTF8&psc=1

Forgive a novice error. I didn't realize tp4056 wasn't a 5v regulated out. this is more what I meant to describe.

No it cannot, not without the control board. This is what you need. https://www.amazon.ca/MakerFocus-Discharge-Integrated-Charging-Protection/dp/B07PZT3ZW2/ref=mp_s_a_1_3?dchild=1&keywords=2a+5v+lithium+battery+protection+board&qid=1613417327&sr=8-3

The holy grail would be a part that can take a high voltage input and charge, while also producing a 5V output (buck), and switch into a 5V boost mode when discharging. So far I haven't found a single IC that can do that.

I'm planning on trying out these, for 5V input based systems: https://www.amazon.com/gp/product/B07PZT3ZW2/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

They'd probably be a little slow for 3 cells. But almost as cheap as the TP4056 with higher power and a 5V boost output.

If you want it cheap, maybe these board? 2a is good enough for most device.

https://www.amazon.com/MakerFocus-Discharge-Integrated-Charging-Protection/dp/B07PZT3ZW2/ref=pd_day0_c_328_1/144-2491653-8033706?_encoding=UTF8&pd_rd_i=B07PZT3ZW2&pd_rd_r=f7a0cae2-5fe8-4f81-bca7-c465144f9ce8&pd_rd_w=2LviI&pd_rd_wg=...

If you can wait a month, order from aliexpress and they'd be even cheaper.

https://www.amazon.com/MakerFocus-Discharge-Integrated-Charging-Protection/dp/B07PZT3ZW2

ive wrote my guesses as to whats what in black sharpie on the ports

ok so what if I used this, between the output of the charge circuit and the input of the Bluetooth module?

https://www.amazon.com/MakerFocus-Discharge-Integrated-Charging-Protection/dp/B07PZT3ZW2

MakerFocus 6pcs 2A 5V Charge Discharge Integrated Module 3.7V 4.2V for 186 50 Lithium Battery Charging Boost Mobile Power Protection PCB Board Module

I use these to charge single cell lipo's in anything i build. So far no problems even with very different sized single cell lipos.

https://smile.amazon.com/gp/product/B07PZT3ZW2/

Yea I ended up using these chips that do all the battery management including charging, voltage regulation on the supply side at a constant 5V, under/overvoltage protection, and allow for pass-through charging so you can use the device while your battery charges.

https://www.amazon.com/MakerFocus-Discharge-Integrated-Charging-Protection/dp/B07PZT3ZW2/ref=sr_1_6?crid=3E5HKV3UHYUO0&keywords=lipo+battery+charging+chip&qid=1641576164&sprefix=lipo+battery+charging+chip%2Caps%2C90&sr=8-6

The built-in battery management system on the Huzzah is poorly designed.

That pouch cell (since it already has undervoltage protection + one of these + usb port would set ya up nicely.

That board will give you a nice 5v out, perfect for powering the nano directly via the 5v pin.

I've used these many times (though usually with esp8266/esp32's) and they work great.

For parallel charging, you just wire the batteries in parallel (see my previous note on how to safely do that). The charger will just see one large cell.

I've used the BQ25895 before in custom designs, charging 3x 18650s. I2C programmable and has a 5V boost converter mode built in. I like it a lot, but I truly hate soldering QFNs. I've never found a breakout board for these (other than the TI eval board). Note that while this part will take up to 14V input (and buck down for the charger), it can't run the charger and the boost converter at the same time. When you charge, the input voltage passes through to the system. I use a separate buck converter for high voltage charging.

I picked up a few of these on Amazon - but I haven't had a chance to try them out yet. My hope is to get 1.5 to 2A charging on a 2 cell system, and combine that with a separate boost converter.