Does that seem like a lot? My iPad sits unused from 8 am to 8 pm. It goes from 100% down to 87%. My wife's iPad is with us during that same time period. It's used a mild amount and is down to 80%, which makes it seem like my iPad lost a lot of charge for being unused. Also, other times I notice my wife's still has more than 90% left at the end of a lot days.