All electronic devices require a power source. Most objects can just be plugged into a wall socket, and the gadget will never run out of juice – blackouts notwithstanding. Portable devices, however, require portable sources of electricity, usually in the form of batteries. While many lightweight devices accept disposable batteries, a growing number rely on built-in rechargeable packs that can be periodically topped off. Initially, built-in batteries were primarily recharged by plugging them into wall sockets via cables. This technique
…
Read more