Solar panels can only generate electricity,can"t store electricity .If you want to store electricity, please purchase our "solar wallet" series or optional backup battery * Change sunlight into electricity power, can be sucked on the car glassess,hung on any kinds of bags and set up on the floor charging for mobile phone,MP3,digital camera,video camera,GPS,etc * Widely applied for outdoor hiking,riding,driving travelling,etc * Sample fully charging time from solar charger YG-050?Mobile phone: 2-3hours , Mobile phone talking time(after charging 30 minutes): 20-30 minutes , PSP/GPS: 3-4hours * It charges quicker under strong sunlight. Warning: can not charge or charge slowly under weak sunlight