... solar charger, high capacity with 2600mAH rechargeable built-in polymer lithium-ion batteries,which can charge for your mobile phone, PDA, MP3, ... lithium-ion, 2600mAH*1PCSOutput of solar chargerDC 3.7V ,4.2V,5.5V,9V (±0.2V), 400-800mASolar energy convert efficiencyover 16%Charging ... phone (Max.) <1 hour (depends on different Cellphones)Charging time for built-in battery by solar 15-20 hoursCharging ...