Few months ago my Dell laptop battery did not work.Whenever I unplug it from main AC supply,the laptop switched off immediately.After few days of frustration, I replaced the battery and kept the dead one (as per my laptop message) for tinkering.I was curious what I would find inside it.
Then I took apart the battery and found 6 18650 batteries inside. Then Icharged the salvaged battery by using a good charger.By luck I found 4 batteries are in good condition. I used one of these 18650 battery to make a descent power bank.It really works fine for me.I thought I'd share the info to all.So that any one reuse it without throwing it in to the dust bin.
In this tutorial I will show you, how to harvest the 18650 battery from any of the old laptop battery pack you might have. Most of the time, laptop battery packs go bad when just one or few cells in the pack are dead. The protection circuit in the charging board cuts out the entire pack as a necessary protective measure for the user. There are still a few good cells though.At last I will show you how you can make a Solar Power Bank by reusing these salvaged batteries
Watch the below video to harvest 18650 cells from a old laptop battery.
Watch the below video to make the Solar ower Bank.
For more details on this project,you can Click DIY Solar Power Bank