You will be surprised when you see inside of the HP Laptop Battery 

Thanks

Thanks

Yes, the only drawback is the charging time will be higher

Thanks

Thanks a lot

Yes you can

Not an issue, charging time will be higher and also backup time will be higher

You are absolutely correct

You are absolutely correct

BMS will not lock. First time hearming

robocraze.com/products/3-7v-2900mah-18650-battery?variant=44442689011936&currency=INR&campaignid=20544560129&adgroupid=&campaign=20544560129&gad_source=1&gclid=Cj0KCQiAqsitBhDlARIsAGMR1Ri8GmNkQ54feU52Re5AcvLdTSnKwbp79a62rTsZBfFjVKfUr8sJxi8aAsg8EALw_wcB Also check hnhcart.om

thank you sir@@TechInsert

0 is minus and 12V is +

I just realised now. They have the controller board pads labelled but only one is labeled as ground so that's obviously wrong

Doesn't each cell need a plus and a ground so 3 grounds and 3 plus

@@emmanuelvalmas5648 Yes and it is ther

@@emmanuelvalmas5648 yes bms has 3 ground and 3 plus connection points and the batteries have been connected properly. see video at 11.45 - 12.00

Yes ofcourse . Charging will take more time and backup will also increase

thanks, this give me new life to my old laptop@@TechInsert

@@TechInsert dear sir, can we use LiFePo4 cell 6000mah, 3 cell for three batteries?

@@Amitkumar12300 Sorry for that late reply. Li Ferro will be 3.2V not 3.7V . It has different BMS. Li-Ion and Li-Ferro are using different BMS. You cannot replace that in the Laptop battery. It will kill your battery soon

@@TechInsert ok sir thanks for your reply

Yes , charging time will increase and backup will also increase

@@TechInsert sir but i doubt if i increase the number of cells like 3 cells in each column, will the amp have any effect, will the bms also have any effect, the bms can handle that load.

@@vrunalpatil9723 No issues- If BMS is 1A, it will max deliver 1A only. If we are pulling more than that, BMS will disconnect the battery to load. Also If you are adding more battery in parallel,, still BMS will not give more current for charging, it will give the same rated current, which will take even more time for charging. Kindly watch the below video and this will give u fair idea about the BMS. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-WZY7hQUE5cs.html

@@TechInsert thank you

@@vrunalpatil9723 You are welcome