Poldera X4000 Power Bank and Wall Charger Combo, PXC4000 The Poldera X4000 combines wall charging and back up power in one, stealthily designed package. With foldable wall prongs for wall charging and an internal 4000mAh rechargeable battery the Poldera X4000 is ready to charge whenever and wherever you need power! Dual USB (2.1a & 1a) allows you to charge two devices at once at anytime. The micro usb in allows the internal battery to be recharged via a car or any usb port - this is especially handy when a wall outlet is not available or during power outages. The internal battery has proven to stay charged and ready to use for 3months or more. Only Poldera ships the Poldera X4000 with the 6" Candi Cord Tri - the connectors on the Candi Cord Tri are micro (Samsung, Nokia, Motorola, HTC, Power Banks etc) 30pin (iPhone3/4/4s etc.) and Mini (GoPro Products, Cameras, Power Banks).