Use the cells from an old laptop battery to power a flashlight
Step 1: The Flashlight Battery
Step 2: The Old Laptop Battery
The old laptop battery. Open the plastic cover and remove the cells
Step 3: Cut the Cells
Cut the cells with wire-cutter
Step 4: Voltage Testing
Test the voltage of the cells and use them from the laptop battery to the flashlight. It works very well for me!