Excellent 90% battery left after a day on the slopes,
Verified Purchase(What is this?)
This review is from: Nokia Burton Insulator Case for Lumia - Orange (Accessory)
Does exactly what it says, only needed to charge my iPhone every other day for a week whilst snowboarding, might even use it in the UK in the winter! Really does extend the battery life and offers a great case to keep other things, money etc when you are in the slopes.