Small but powerfulwith a 21a output the pebble explorer is designed to charge tablets in the most efficient way this means that your tablet power is replaced as quickly as possibly when youre low on charge and away from a mains source dont worry if your smartphone is also low on charge because the explorers dual port design means its capable of charging 2 devices at the same time the powerful 8400mah battery can give most tablets a complete full charge and most smartphones up to 5 charg