The MiLi Power Pack 4 is the world's longest lasting iPhone 4/4S case with battery charger (White/Silver) that triples the life of your battery. With it's sleek form fitting design, it will also protect you iPhone 4/4S from scratches. This external battery features a capacity of 3000 mAh to keep your device powered for hours and a play-through design, so you can still sync your phone.
|Standby time||Up to 675 hrs|
|Talk time||Up to 11.25 hrs on 3G|
|Internet Use||Up to 11.25 hours on 3G
Up to 19.95 hours on Wi-Fi
|Audio play||Up to 87.5 hrs|
|Video play||Up to 22.5 hrs|
|Self-charging time||4.5 hrs|