Has it ever happened to you that before turning off the light you check your phone and it has 80% battery, but when the alarm goes off the next day the phone is at 20% or completely off? It's not black magic and your battery isn't failing. The real problem lies with apps that keep working while you rest, and one of the main culprits has a name: TikTok. This phenomenon is more common than you think. Millions of users worldwide wake up every morning to the shock of seeing their battery indicator at alarming numbers, without understanding what happened overnight. The answer lies in something that happens silently inside your device: background activity. What are background apps and why do they drain your battery? When you close an app by swiping your finger, you often think you're turning it off completely. But in reality, most apps simply remain "paused" or continue running invisibly to update content, sync data, check notifications, or track your location. This behavior, technically called background refresh, was designed so that apps are ready when you reopen them. The problem is that this process continuously consumes CPU, RAM, and data connection, which directly translates to battery drain. According to recent analyses, the apps that consume the most battery in the background are primarily social media and messaging platforms: Instagram, TikTok, WhatsApp, and X top the energy consumption rankings because they need to remain active even when not open in the foreground. These are joined by map apps like Google Maps or Waze (which use GPS intensively), streaming platforms like YouTube or Netflix, and also cloud storage apps like Google Drive or Dropbox, which constantly sync files. The most worrying thing is that all this happens while you sleep peacefully, without you noticing a thing.

Why TikTok is one of the worst energy vampires on your phone

TikTok isn't just an app you actively use. It's a platform designed to keep your phone's processor working at full capacity even when you close it or fall asleep watching videos. This is due to two features that are enabled by default: Continuous Autoplay and Background Refresh.

If you fall asleep with TikTok open (something that happens to a lot of people), the app keeps loading and playing videos in an infinite loop, processing artificial intelligence algorithms and consuming data nonstop, even if the screen is locked. The result is devastating for the battery:

And it's not just about running out of power for the next day. Keeping the processor in a high-consumption state for hours while you charge your phone accelerates the battery's chemical degradation, progressively shortening its lifespan.

In other words, TikTok not only drains your battery overnight, but in the long run, it damages your overall battery health.

Furthermore, according to technical data, if you have Background Refresh enabled, TikTok downloads new content from your "For You" page even when the app is completely closed, using between 50 and 150 MB of data daily in the process. All this while you sleep.

How to protect your battery at night in 3 concrete steps

The good news is that there's a solution, and it's simpler than it seems. Here are the most effective steps to ensure your phone wakes up with a good charge:

The reality is that your phone shouldn't lose more than 5% battery during a full night of inactivity. If you're seeing much higher numbers every morning, you know where to look for the problem. It's not your battery, it's not your charger. It's those apps that never really sleep.