Power Tool Repair (Black and Decker Jig Saw LPS7000)

Replacing the battery on Black and Decker Jig Saw LPS7000. Hope this video helps someone if they have the same problem
18650 lifepo4 batteries: ebay.us/sV3UrS

[@dudahertz]

Can you tell me what the real voltage comes in the original charger? I bought a used tool without a charger, but I have a lot of adapters/chargers with different voltages. The batteries need 8.4v, but I think there is a voltage drop before it arrives in the batteries. I need a charger with more than 8.4v. If you can check the voltage that comes in the original charger I appreciate. Thks