12,000 mAh battery provides reliable, powerful backup power when you're on the go and is easily charged using your Dell power adaptor. A five-segment LED clearly displays how much power is left, so you can plan accordingly. The Dell Power Companion helps keep all your mobile devices charged and ready to go, including smartphones, tablets and more. Two USB charging ports let you simultaneously charge a pair of mobile devices in addition to your Dell notebook. This compact power solution fits seamlessly into your mobile lifestyle by fitting neatly into your laptop case or bag. The Dell Power Companion is designed to deliver in-bag charging, so your devices are charged when you need them. 12,000 mAh, 6 cell Battery, Lithium Ion Device Type: External battery pack