Here is a link to a schematic for a "Solar Battery Powered Tablet" https://wp.cbos.ca/solar-batte…. A member on this site expressed interest in this. A per the geographical basis for this site, stores in the area are referenced. You will have to find the equivalent for your region if you are located elsewhere. That being said, the specs include a 25W monocrystalline solar panel, a 12 volt controller, a 5Ah sealed lead acid (SLA) AGM battery. This is the kind you can put any which way, and it won't leak or give off gas, under normal conditions, and an 8" tablet. Contact me for more information.