Solar Power Bank Using Old Laptop Batteries

Hi All,

In this instructable, I will share how to make a Solar Power Bank using a Kit and old Laptop batteries

This kit was bought from Aliexpress. The power bank has a led panel that can be used for camping. so good builtin power bank and light combination

Step 1: What Do We Need ?

• Solar Power bank kit from Aliexpress (https://a.aliexpress.com/_d8ypnQv )
• Old Laptop Battery
• Multi meter
• Soldering Iron
• Wires

Step 2: Extract Batteries

I have extracted my batteries from old laptop battery

• Gently break open the outer shell
• Carefully disconnect batteries from circuit and each other
• Test battery voltage, it should be above 3v

I have used batteries that were around 2.5 v and yet worked fine

Step 3: Battery Pack

• To make the battery pack we need 4 cells connected in parallel
• Remember to use thick copper wire
• Do not overheat the batteries while soldering, take breaks if needs

Step 4: Assembly

• On the main PCB, we have following, clearly marked
  • Battery ( B+ and B-)
  • Solar+ and Solar -
  • Led+ and LED-
• This makes is extremely simple.
• Just solder the respective wires on the PCB
• You may have to secure panels and batteries using tape or hot glue
• Always before closing, test every thing

Step 5: Close It Up

• The outer case needs to be secured with extremely tiny screws..
• Once done, charge the power bank full and then using USB doctor to test the actual capacity
• Solar Panel, does not really do much
• The LED panel is good for camping or emergencies