New Delhi, Nov. 17 -- We live and work in a world where charging matters more than ever. Phone dying before noon, laptop running low at a cafe - at those moments, the adapter you plug in is the difference between making a call, finishing a project, or being stuck. Most people don't think twice before using random adapters for their devices. But if you care about safety and speed, it's time to be careful about what powers your device.

Every device including smartphones and laptops are engineered with specific voltage and current requirements. The adapter that ships with your gadget is built to meet those exact needs by providing just enough power to charge quickly, but not so much that the battery faces irreversible heat damage or swellin...