Evikoo&trade; Mp-s23000 II Solar Charger 23000mah USB External Rechargeable Portable Battery Pack for Laptop Cell Phone High capacity of 23000mAh;A wide range of output voltage:5V,12V,16V,19V Compatible with notebook,laptop,cellphone,mobile phone,iphone,ipad,ipod,Galaxy Tab,most mobile phone,PSP,MP3,Mp4,GPS Solar energy and efficient solar charger circuit Long life: rechargeable li-polimer batteries,up to more than 500 circles,later the power can still remain 80% after 3 month. Multiple safety protection systemto ensure decices safety :protection for overcharge overvoltage.overcurrent and short circult