I plan to build a 4S2P battery pack and have chosen to use a 30A BMS. My understanding is that the BMS will stop the individual cells from charging beyond 4.2V.
In such an environment, can I charge my battery pack using my 20V 4.5A laptop power adapter, or do I specifically need a 16.8V 1-2A charger?
The measured capacity of the cells are 1500 mAh or 3AH in the finished battery pack.
This is the BMS and charger I bought, respectively:
I am going to use two 4x18650 battery holders. I will connect the cells to the BMS as mentioned in the diagram and will connect the P+/P- to a 5.5x2.1mm female power jack.
I can then plug in my charger into that or plug in my motor or other electronics into that. Does this sound good?