How to Restore a Dead Laptop Battery

By Megan Allyce Snider

Having a dead laptop battery can be a problem. You're on the go with your portable computer, and you may not have access to an electrical outlet. There are ways you can fix your battery without the expense of buying a new one.

Things You'll Need

  • Lithium ion batteries
  • Safety glasses

Step 1

Remove the battery from your computer. You will re-use this battery; handle it with care. The battery may be located on the left or right side of the laptop and sometimes pops out. If you close your laptop and flip it over, you can clearly see where it sits on the computer. Usually the logo and model of the computer are clearly printed over the battery.

Step 2

Pry open the battery casing to reveal a set of six lithium ion batteries. These will be 3.7 volts and 1600 milliamp batteries. Note the polarity and placement of each battery; make a diagram of their positions and the wires that fit into them.

Step 3

Pry out the lithium ion batteries.

Step 4

Unsolder the wires from the dead batteries, again making note of their polarity, where each one goes and where the wires fit in. Put on safety glasses. Solder together the new batteries so that all six are connected.

Step 5

Insert the new set of six lithium ion batteries into the battery casing. Solder the wires back into place. Snap together the battery casing and place it into your laptop.

Step 6

Charge your laptop for at least 18 hours. Test the laptop's ability to run off the power in the batteries.

Tips & Warnings

  • You may charge your battery for longer than 18 hours for optimum charge.
  • Be ready to spend a few hours on rebuilding the battery.
  • Use caution while soldering.

References & Resources