Review on 🔋 LHIABNN DIY Power Bank: Build Your Own External Battery Pack with 2 Output and 3 Input (Micro, Type C, Lightning) - 18650 Battery Not Included by Matthew Thorndike

I pulled a bunch of flat top 18650s out of some dead laptop batteries and put them in this case for fun and used as a proof of concept before i built my own. It worked great for a day or two and then stopped working. Either my charger was too powerful or the electronics in this thing had failed. Warning: Once this is closed, destroy it by opening it again.