"Rechargeable" refers to items, usually batteries, that can be used multiple times after being charged. Unlike single-use batteries, which are discarded after their energy is depleted, rechargeable batteries can be plugged into a power source, like a charger, to restore their energy. This makes them more environmentally friendly and cost-effective over time. Many everyday devices, such as smartphones, laptops, and electric toothbrushes, use rechargeable batteries. When the battery runs low, you simply connect the device to a power outlet or a USB port to recharge it. This convenience allows users to enjoy their devices without constantly needing to replace batteries.