XCSOURCE 2pcs Rechargeable Battery + Charger Dual Dock Charging Station Base Kit for XBOX ONE Controller AC675 Spec: Input: 5V/1A Output: DC 2.8V Battery capacity: 400mAh Charging time: 2-3 H Playing time: 2-3 H(each battery) Battery size: Approx. 29mm x 53mm x 16mm(L x W x H) Dock size: Approx. 89mm x 20mm(D x H) GB Color: Black