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: 5.51\ L x 3.74\ W x 2.09\ H (140.00mm x 95.00mm x 53.00mm)