A hefty portable power bank is a handy thing to DIY, but one needs to get their hands on a number of matching lithium-ion cells to make it happen. [Chris Doel] points out an easy solution: salvage ...

Hey MBC! I wasn't sure if this would be better here or in Other Hardware... it's not really computer-related so I thought maybe here was better, but I know OH has historically discussed this sort of ...

Wesley Chang is an assistant professor of mechanical engineering and mechanics at Drexel University. Rechargeable batteries are great for storing energy and powering electronics from smartphones to ...