Hi. For me, the maximum output was around 90W but i will test it soon again because i made some modifications since then. What i know for sure that the input can really be 100W so it would be logical that the output can also achieve that. According to the product description, this one has a BMS, but in reality, sadly it does no balancing at all. It will stop charging the whole pack after reaching 4.2 on either if the sections and then it won't balance it. It's possible that only mine is behaving like that... But i already have a 5S BMS and I will try to make them work together somehow.

it usually happens if your board is not the same string as your batteries. For example, your batteries are S5 but your board is configured for S4. Then if you charge it will think it's already charged at 100% because for S4 it would be maximum already. Check how your board is configured. You can see the difference on the product site where they are showing the difference with the resistors.

Is there any link for the site because I think all the pictures on the net are the same

I ordered as s3 65w but I tried with 3s 4s 5s sometimes it goes to 100 it can charge other things but won't take any charge and stays at 0% any solution I'm so pissed and so desperate to fix it pls help

@@ahmedothman798 you could try to check this description: www.aliexpress.com/snapshot/0.html?orderId=8165162499145043 Here you can see which resistor is responsible for the battery string options and you can check how it's configured on your board. Also, doublecheck if you soldered the batteries in the right order to the board.

@@cinkoxid I did everything sir I soldered the board so many times

5S

Can 3s or 4s configuration for that circuit can charge a laptop using PD decoy 20v? Thank you 😊

yes. both can. 4s could still provide 20v and 5A maximum, while 3S would give you 20v and 3.25A@@victordadap5744

yes i'm very satisfied with it so far

@@cinkoxid does it do 100w input and output

@@Iinustechtips Yes for input but i didn't charge it for a long time like that because i like to charge it slowly. The output was around 90W for me but i will test it soon again because i made some modifications since that.