Solar charges 1). Solar panel: 0.8w 2). With 1pcs 1800mah lithium polymer rechargeable battery. Can store energy. 3): input to inside battery 5v/140ma, could charge into mobile phone 140ma*4hours*80%=448mah.(suppose in shenzhen, china, usual day, with sunshine.) In side battery could be fully charged within 1800/(140ma*80%)=16.1h(standard hours)= 4 days in shenzhen. 4): output to mobile phone. After charged one day ( suppose no energy in inside battery before.) could charge 448mah*80%=358.4mah into mobile phone. After fully charged inside battery ( charged 4 days in shenzhen). Could charge 1800mah*80%=1440mah into mobile phone. Product size:11.8*7.4*1 one packing size: 15.7*11.4*3.7
