Swiss Cougar Hanoi Solar Lantern & Power Bank - 2,400mAhthe rechargeable 2,400mah battery in this multi functional item powers the lantern and the flashlight, so you wont need to buy batteries. It also functions as a power bank to charge your phone. The flashlight and the lantern both have adjustable brightness levels and functions. An additional feature of this model is the solar panel, which can also be used to recharge the battery. The solar charging is quite slow, and simply functions as a backup