... samsung Galaxy s3. &Lithiun-polymer battery. &with 2800mAh external battery case for galaxy s3 Specifications:cell type ... LED≤25%,2 LED≤50%,3 LED≤75%,4LED=100%.2. Up to unplug the external battery cover,slide ... longer time (3~5second), Open the external battery switch, Start charging, Charging prompt appears on ... -25%,2 LED-50%,3 LED-75%,4 LED-100%. Circuit protection function:When the battery voltage ...