Mfr: Artisan Power Series: - Package: Retail Package Product Status: Active Type: Charging Station Battery Chemistry: Lithium-Ion Battery Cell Size: 3.7V Number of Cells: 4 Voltage - Nominal: 5V Charge Current - Max: 2.5A Charge Time: 3 ~ 4 Hrs Size / Dimension: 7.29\ L x 4.06\ W x 1.10\ H (185.00mm x 103.00mm x 28.00mm)