Can Telegram notifications be disabled? Can you disable Telegram notifications somehow? I am seeing a huge battery consumption since last few weeks and after upgrading to Android 5.0.2. After one day of use battery app is reporting that Telegram has kept mobile radio on for 7 hours. Using 50% of the battery used.

I use telegram rarely. I would like to completely disable notifications, but I cant find any option for that. I have tried disabling notification service and everything.
First, AFAIK, "Notification Service" makes reference to receive notifications in Telegram about every new update (changelog or "What's new"), as well as another announcements which Telegram staff may consider important for you to know via Telegram chat.

Second, Android Lollipop has a new way to manage notifications per app. Enter Settings screen for your device and follow these steps:

 

 

Note: Screenshots taken from my Sony Xperia Z1 running Android 5.0.2,  appearance may vary for your device.