... Easy to charge for the solar charger bag, tent, etc. 3.CE, FCC, ROHS,PS 54000mah or 20000mah power bank for laptop, iPad ... .Exclusive voltage foolproof design, you cannot switch voltage during using, resulting in voltage does not match, resulting in damage ... times high-efficiency Poly-silicon solar panel, conversion rate " > 16%, normal life" >20 years. solar Power bank for Laptop, iPad, iPhone, mobile ...