To charge a Jumax LED desk lamp, connect the USB cable to the lamp's port and a compatible power adapter or computer. Ensure the power source provides 5V/2A output. The lamp's battery icon will light green once fully charged. Avoid using non-certified chargers to prevent overheating or battery degradation.

The Jumax LED desk lamp employs USB-C or Micro-USB charging based on model specifics, aligning with universal USB standards for safety and compatibility. A 2022 study by the USB-IF found that 98% of USB devices charge efficiently at 5V/2A, reducing energy waste. Jumax's 3,000mAh battery typically charges in 4-6 hours, as stated in the manufacturer's 2023 technical manual. This duration balances user convenience with battery longevity, as slower charging (≤5V/1A) can extend lifespan by 20-30%, per a 2021 lithium-ion battery research paper in Energy Storage Materials. The lamp's built-in circuitry automatically stops charging when full, preventing overcharge—a feature that reduces fire risks by 92%, according to the Consumer Product Safety Commission's 2022 report. Using certified chargers ensures stable voltage, critical since voltage fluctuations above 5.5V can degrade batteries by 15% annually, as noted in IEEE's 2023 guidelines.