... which using life can reach 50,000 hours. LED sources have the features of lower energy consumption, no ... circuit and overload protection, which can keep solar LED camping light from damage. If USB comes to ... with USB. Two way charging Solar panel (power is 3.5W) charging: it needs 10-15 hours (depends ... to full charge the battery, and it can work 3-5 hours continuously.AC85-230V charging: more quickly, ...