The following instructable demonstrates how to make a battery holder for 18650 cells from old laptop battery pack.
To construct it you will require the following:
2 of 3/4" PVC threaded caps
1 of 3/4 PVC pipe 75mm
1 of 18650 battery from old laptop pack or new battery works
1 any battery holder, in this case i used a old 4XAA battery holder
2 hex nuts
1 Drill Bit (depending of the screws size)
1 Screwdriver ( depending of screws type)
Step 1: Step1: Drill and Cut the Pipe
1.- Cut pice of 70mm from 3/4 PVC pipe
2.- Drill a hole on the top of 3/4" PVC threaded caps, the hole in the center its ok but not primordial.
3.-Rip off the springs from 4XAA batter holder
Step 2: Step 2: Cap Assembly
1.- Put inside of the cap 1 spring with 1 screw and 1 washer
2.- Repeat the step 1 for all pvc caps.
Step 3: Step 3: Test and Results
1.- Put de pvc caps on each side
2.- Take a multimeter and test the voltage.
3.- Now you ready to use on any project