The World Runs on Batteries Lithium batteries power everything - including cell phones, laptops, toys, appliances, power tools, and electric toothbrushes. High-tech devices usually contain rechargeable lithium-ion batteries because it is much more convenient to charge a device than it is to frequently dismantle it and replace a standard alkaline disposable battery (commonly used in basic devices like tv remotes or flashlights). Lithium-ion batteries last much longer and have higher power density than traditional batteries.   What’s in a Lithium Battery? Lithium batteries are composed of various elements, including lithium-ion or lithium-polymer cells, a protective casing, electrolytes, and valuable metals [...]