Cast 4000 mAh light-up power bank. The Cast 4000 mAh power bank features a 4000 mAh grade A lithium polymer battery with a 5V/1A output. Includes a 2-in-1 charging cable that is compatible with any iOS phone, and any device with a micro USB port. When the front section is decorated via laser the company logo will light up!. ABS plastic.