Snapchat has always been a battery hog but I've never had this issue. It's similar to the Facebook one recently but not as bad. I'm getting a lot of background usage with snapchat even though background app refresh is off and the app is closed. I'm constantly at 11% usage. Well, it was 12% for the last 24 hours because I used it heavily a just a bit ago. I hate using the app but many of my friends use it primarily to communicate (no idea how they manage, it's awful) so yeah. I wish I could simply delete it but I can't really.