Whatsapp drain battery very very fast!

I had the same problem, I found that it is the icloud bakcup. Although I had the chat backup of the whatsapp disabled, I was constantly trying to background.
While you have active the icloud backup and have no space will continue trying.

Not sure why you think this is a problem.

The last screenshot shows you used WhatsApp onscreen for almost 2 hours and and an hour in the background.

If your battery health is 89%, your battery is not new and is on its way to being depleted from regular use. Good health is 80%, so you are mathematically almost halfway to depletion.

I am experiencing the same problem. It started a few weeks ago, that I noticed drastic loss of standby time. For example last night I had the phone fully charged before going to bed. This morning, even in flight safe mode it went down to 10 % on my not even 2 year old 6s. Battery status showed me 62% were used by WhatsApp. And I did not use WhatsApp during my sleep at all. ;) I think this started with the last iOS update.

I have the same problem here. My battery usually reaches 40 ~ 30% at the end of the day, and now ends before 5pm. Today WhatsApp has 1hr on screen and 3.5hrs on background. :(

It sounds like the WhatsApp app has a problem. Contact them and report it and wait for an update from them.

I have the same problem. For me this started after recent iOS upgrade. Watsapp has not been upgraded recently. Looks like something for both Apple and Watsapp to work together.

I have the same problem with my iPhone 6s. Are you guys using iPhone 6? could it be the iPhone model that is causing the problem?