No. There are two things to consider. 1) This a step-DOWN converter. The output voltage will never be greater than the input voltage. In fact, the input voltage must be at least 2V greater than your desired output voltage. If you want 6V output, the input voltage must be at least 8V. So you will need at least three 3.7V lipos in series to get 6V from this converter. 2) The maximum output current this converter can provide is 2A. Therefore, you must be certain that the load connected to the output of the converter draws less that 2A. In addition, you must also be certain that the maximum continuous discharge current of your lipos is at least equal to the current required by your load.

I'm pleased I could help. -- Jeff

I am glad to help.

I have not tested this module using a battery, but it should work -- for a while. My concern is what will happen as the battery discharges and its output voltage decreases. As the battery voltage decreases, the output voltage of the module may decrease as well. This applies to any battery, but a high-capacity automobile battery (for example) will maintain its voltage under load longer than a smaller low-capacity battery.

I am pleased that you like my video. The module in the video uses a LM2596S regulator. - Jeff

I'm pleased that you found my video helpful, Dan. 73, Jeff

Hello Roy. It is not clear to me exactly what you hope to do with this module. Please understand that the maximum input voltage for the module is 40 VDC. The highest voltage I have ever applied to the module is 15 VDC. -- Jeff

My guess is that your board has failed. I initially purchased 5 of them, and in the past 6 years, one of my boards failed.

Ken - I'm glad the video was helpful. I know nothing about battery charging LiFepo batteries, so my comments may not be especially useful. You do not state the input voltage to the converter module. The input voltage must be about 2V higher than the desired output voltage. Thus, if you want 12.9VDC out of the converter, you'll need at least 14.9VDC on the input. Also, you'll get a more stable output voltage if the input voltage is regulated. Many wall wart power supplies are not regulated. - Jeff

Olá Manin. Eu não falo português. Desculpe. - Jeff

@@RealAstronomyBoy amigo a legenda e frazes mostrando na tela se desse pra mostrar fica bem melhor

Thanks for that report, David. It's the first I have heard of that sort of problem. It makes me wonder about how much quality control to expect from a $2.00 circuit board. - Jeff

I have not tested this module with a varying input voltage. I invite anyone with a variable DC power supply to perform some tests and post the results in these comments. Thanks - Jeff

That is a good question! Unfortunately, I do not know the answer. If anyone has experimented with a variable input voltage, please tell us your results. Thanks! - Jeff

Glad I could help, George. Without instructions, this module is difficult to figure out. - Jeff

I do not know how to calibrate the one-button version of this module. My video instructions apply only to the two-button version. - Jeff

Hi Chris -- I have no idea what it means to "shock a motherboard." So I cannot tell you if this module can be used for that purpose.

@@RealAstronomyBoy so i have a motherboard that is fried but i need to inject voltage to see what mosfet is damaged

@@chrismagallanes8858 As long as your application does not draw more than 2A, my guess is that it will work. But since I have never done this, I take no responsibility for any problems that may arise. - Jeff

This module can provide a maximum of 2 amps. It can never provide more than 2 amps no matter the specification of input power source. - Jeff

The output is always on. You could add an external switch on the output if you wish. - Jeff

@@RealAstronomyBoy ordered. Thanks!

Hi Ben - I'm sure you meant to say "too long" rather than "to long." Anyway, we all look forward to seeing a shorter but equally helpful video from you on this topic. When can we expect you to upload your version? Thanks - Jeff

Turn the tiny screw many turns anti-clockwise (counterclockwise). It may take 10 or more turns before the output voltage begins to change - Jeff

You are very welcome - Jeff

Possibly. This module can supply a maximum of 2 Amps of current. If your laptop requires less than 2 Amps, it might work. - Jeff

@@RealAstronomyBoy I think i need to buy 2 and connect them in parallel and use a car battery instead, will it give me 19 volts 4 amps?

@@erwin2tarmac305 NO. This module is a step-DOWN voltage converter, not a step-UP voltage converter. The output voltage can never be greater than the input voltage. A fully-charged car battery produces about 12.5 V, perhaps a bit more. So, when connected to a car battery, the maximum output voltage of this module can never be more than 12.5 V. Another point: I don't know if these modules can be operated in parallel. I have never done it, nor have I heard of it being done. - Jeff

@@RealAstronomyBoy Oh my bad, i mistook it for a 6009 boost converter

Glad I could help! - Jeff

Please note: I have no experience with a 5A version of this module. With that said, the phrase "3A of input voltage" is rather puzzling. Amps is a measure of current, not voltage. Perhaps what you are asking is whether your module can power a device that draws 5A of current if the power supply for the module can provide only 3A of current. The answer is: probably not. As for the heat sink, I've never used one with my modules. However, I have seen small aluminum heat sinks that are meant to be attached to the LM2596 on the circuit board. The LM2596 is the black chip-like device with 5 contact legs protruding from it. - Jeff

It is called "LM2596 Buck Step-down Power Converter Module." I found it on eBay. There are many sellers for this module on eBay. - Jeff

@@RealAstronomyBoy thank you ❤