EHarvest Sensors eQUICK Tablet Portable USB Solar Battery Charger Charges smartphones, tablets, wireless speakers and more Get 4 smartphone or 1 tablet charge from 20Whr detachable Lithium Ion battery pack Fast device charging (same as the device AC adaptor) Lifetime batteries 2000 cycles (never replace batteries) Dual USB Power Splitter accessory (charge 2 devices simultaneously)