5S IPhone Very High battery drain--MapQuest app running in background.
Consider this if you have a Very High battery drain. I have an iPhone 5S but it could any iPhone. About 4-5 updates ago I started having very high battery drain on my iPhone 5S. Battery usage might drop from 80% to 10% or 2% within a fraction of a second. Plug it into power & it might jump back to 70% in a fraction of a second. I had knowingly made no settings changes.
I had a new battery installed by Apple. Same high battery usage continued but seemed a little better. Most recently while I was asleep with both Cellular & WiFi turned OFF the battery would get hot & I would use a full 100% battery charge in 6-8 hours.
With the update to 12.1.4 I looked at the battery usage feature & found that while I might have 15-20 minutes of total usage for items other than MapQuest; MapQuest, with Cellular & WiFi turned off might use 200 minutes or more in the background. My best guess is that MapQuest was trying to function for location even though Cell & WiFi was turned off.
I did not find much online about how to turn MapQuest off or even about MapQuest. Search for MapQuest & usually Apple or Google locators pop up. Finally I went into the MapQuest app & turned off everything I could find. I like MapQuest & if I need it I will turn features back on. If things go South again I will remove the program entirely.
I am still evaluating but in general it looks as if MapQuest running in the background, even with WiFi & cellular turned off was just eating up battery power extremely rapidly. I suppose any program app could do this but if you have a rapid battery drain & the battery is good, look at the battery usage under settings and see what is actually using all of that battery power. (And Apple, stop throwing bright screen into everything. My screen brightness is set where I like it & has been for years & has not changed. That is not a reason for high battery usage. If I can't use the screen brightness the way I want to use it, why have the iPhone?)
iPhone 5s, iOS 12