Laptop battery pack DIY connectors 

See the rated capacity of your battery to compute time. For a 6000 mAh would be 6 hours at 1 A. Yes, sparks are expected

Sorry bro, it worked for me. Try to bend the connector tips so they make better contact

Ofc it depends on the battery manufacturer and type, mine has a label near the connector. You need to make sure in your case, here is a link that can help you to identify the pinout: kuzyatech.com/testing-laptop-battery-pinout-smbus-charge-capacity

No, it’s not possible, you need a balanced charger which delivers the correct voltage to each of the three cells. Or an interface to connect to the battery that can communicate with it. You could try to disassemble the battery and apply the 13v to the two extremities of the cell arrangement with a resistor in series to avoid overcurrent and checking voltages manually. But it’s risky and you may damage the battery while disassembly, only try it if you really know what you are doing

@@argilaga Thanks The battery not have BMS(balanced charger)? ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-NpV1Y91LZpU.html montazhtv.ru/fa/kak-mozhno-podzaryadit-akkumulyator-ot-noutbuka-kak-zaryazhat/

You are welcome!

I determined I needed to ground the SYS PRESENT pin on a Dell D600 battery to get output voltage. I was able to discharge the battery using the outer most pins and did to about 9v. However I can't charge it using the outer most pins. No current flow into the battery only current flow out of the battery. Do I have to ground or apply voltage to one of the other pins to allow charging on the battery? The battery after I discharged it charged perfectly in the Dell D600 laptop.

Yes, I assume that some kind of digital communication with the charging board is needed. I could not find a way to charge it from the pins, in some other videos you can see how I balance-charge the pack by directly accessing the battery cells.

@@argilaga I have taken apart laptop battery packs before and use my iMax B6 to balance charge them. It's rare you need to do that but if needed then I would suspect a cell is starting to die. They sell devices just under $100 that can externally charge a laptop battery. Would like to see the schematic of how they do it. I also noticed a few Arduino projects to read the data from the board in a battery. I would guess someone has figured out how to communicate with the onboard chip to charge, and reset the amount of times the battery has already been charged. There is one expensive unit that can do many different brand batteries. Complete analyze, charge, discharge and tell you the health of each cell. Several hundred dollars that probably could be built with a raspberry pi or Ardruino for less that $50

You could charge it, but the cells will not be balanced, i.e. they will have slightly different voltages. You need to balance charge or charge using the + most connector and - most connector and then balance the excess voltage. Check the videos: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-t5dAi3EwS2k.html and ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-0LRQaPDoAGs.html

I do not have a Samsung battery to check it

Thanks! I like your username

You are welcome!