I noticed horrible battery life on my iPhone 6S (could not last a day with light or moderate use). I removed the Facebook app which had a positive effect. But still, it was bad. Then, I decided to reinstall the phone as new. What a difference! But as soon as I installed WhatsApp I again notice a serious impact. Under Settings -> Battery I see that the Usage time and Standby time are equal when WhatsApp is installed. Is this a known issue? I disabled "Background Refresh" for WhatsApp but that did not help. Actually, it's impossible to see in the iOS settings which app is responsible for this usage. The usage minutes of the individual apps do not add up to the total amount displayed. Is everybody with WhatsApp impacted? Are there alternative apps to use the WhatsApp service? I hope, one day Apple will force all FB-apps to quit running in the background and make proper usage of Push notifications and Background Refresh. Maybe they should ban these apps from the store until they are fixed?