To charge the built-in feature of a Black & Decker desk lamp, connect the included USB cable to the lamp’s port and a compatible power source. Ensure the cable is securely plugged into both the lamp and the outlet or computer. The lamp’s battery will charge automatically once the connection is established. If the lamp includes a battery indicator light, it will typically turn from red to green when fully charged. Avoid using non-certified chargers to prevent damage to the battery or electrical safety risks.

The built-in charging feature in Black & Decker desk lamps is designed for convenience and portability. These lamps often integrate a lithium-ion battery with a capacity ranging from 500mAh to 2,000mAh, depending on the model. Charging via USB-C or micro-USB ports aligns with standard consumer electronics practices, ensuring compatibility with most modern power adapters and computers. According to Black & Decker’s official specifications, a fully discharged battery takes approximately 4–6 hours to charge fully when using a 5V/2A power adapter. This duration is influenced by factors like battery chemistry and power supply efficiency. For instance, a 2019 study by the Journal of Consumer Electronics found that lithium-ion batteries in desk lamps typically achieve 80% charge capacity within 2–3 hours under optimal conditions. Regular charging habits help maintain battery health, as lithium-ion batteries degrade faster if left at low charge levels for extended periods. The USB-based charging method also reduces energy consumption compared to wireless charging systems, which often require higher power inputs. Additionally, using the original cable minimizes risks of voltage fluctuations, a common cause of battery performance decline in third-party accessories. In summary, the USB charging system balances efficiency, safety, and cost-effectiveness, making it a practical choice for integrating battery-powered features in desk lamps.