I'm trying to build a Li-ion battery pack and is using this BMS module. Recommended charging voltage is 16.8V -18V. I have an old laptop charger lying around; its output is rated 19V 3.42A.
I'm wondering if the laptop charger is any good for charging the battery pack if the voltage is stepped down to 18V, but I cannot seem to find a way.
Considered using LM7818 but I think it needs an input of about 21V. Also considered using LM2576-ADJ, but not sure if it also can step down to 18V even if R1 and R2 resistors are selected accordingly.
Any help appreciated. Thanks.
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