"Rechargeable" refers to batteries or devices that can be restored to a full charge after being depleted. Unlike single-use batteries, which are discarded after their energy is spent, rechargeable batteries can be used multiple times, making them more environmentally friendly and cost-effective over time. Common examples include lithium-ion batteries found in smartphones and nickel-metal hydride batteries used in some household appliances. Rechargeable devices often come with a charger that connects to a power source, allowing users to replenish the battery's energy. This technology is widely used in various products, including electric vehicles, laptops, and power tools, promoting sustainability and reducing waste.