Fake Low Battery
The fake low battery prank plays the death rattle: a big red battery icon, "1%", a warning, then a slow fade to black. Ideal for handing someone your phone at exactly the moment they needed to use it.
Press F11 for maximum realism. Tap or press Esc to exit.
For the best results, add this to the device's home screen. It then opens with no address bar, no tabs and no URL, so there is nothing left to give it away.
It gets people because a dying battery is completely ordinary. There's nothing suspicious to notice, just mild panic and a hunt for a charger. On a laptop instead? The fake shutdown screen does the same job on a bigger display. Want the other classic phone annoyance? Storage full refuses to go away no matter how many times they tap OK.
How to use the fake low battery prank
- On a phone, add this page to the home screen and open it from the new icon so the address bar is gone.
- Tap Launch Full-Screen Prank: a red 1% battery warning appears, and about six seconds later the whole screen fades to black over a few seconds.
- Pass the phone over right after launching, while the red warning is still on screen.
- Tap the black screen, or press Esc on a keyboard, to bring the page back.
Setting up the fake low battery screen on iPhone, Android or a laptop
On an iPhone, open the page in Safari, tap Share, then Add to Home Screen, and launch the prank from that icon. iPhone Safari does not let ordinary pages go full screen, so this is the only way to hide the browser there. On Android, Chrome's menu offers Add to Home screen or Install app, and on phones this page shows an install button when the browser allows it.
On a laptop it runs in any current browser, with F11 on Windows or Ctrl + Cmd + F on a Mac if a toolbar is left. It is less convincing there, though, because laptops do not usually warn about a dying battery with a full-screen icon.
What the fake low battery warning shows, and what it cannot do
A white battery outline with a thin red sliver of charge sits on a black screen, with a large red "1%" and a line saying 1% remaining underneath. After about six seconds the whole picture dims to black over three seconds and stays black.
The page cannot read the real battery, switch the phone off or block any button. Pressing the side button locks the phone as normal, and unlocking it shows the same black page. While it runs, the page asks the screen to stay on on browsers that support it, so the black screen does not lock by itself.
Timing the fake low battery reveal, and when to skip it
The fade starts quickly, so the joke works best handed over mid-moment: someone about to send a message, check a score or show a photo. When the screen goes black and they start hunting for a charger, tap it, and point at the real battery level in the status bar.
Skip it when the phone is someone's map, ticket or way home, and on anyone's phone during an emergency or a call they are waiting on. For more harmless ideas for the day, see the April Fools' pranks list.
Frequently asked questions
Is my phone actually about to die?
No. The animation imitates the low-battery warning and nothing else. It cannot read or change your actual battery level. Whatever charge you had is still there.
Will the fake low-battery screen keep working?
It holds until you close the tab or press Esc. It will not time out or reset itself, so it survives being handed around.
Does it show the real battery percentage?
No. The number shown is set by the animation, which is why it reads 1% even on a fully charged phone. The page never accesses the actual battery.
How do I hide the browser so it looks real?
Add the page to the home screen and launch it from there, with no address bar and no tabs. That's essential for this one, because a low-battery warning appearing inside a browser window is instantly wrong.
Does it look right on both iPhone and Android?
The red battery icon and fade are close to universal, so it reads correctly on both. The exact styling of the real warning differs slightly by phone and version, so it works as a convincing glance rather than an exact match.
Will it actually drain my battery?
No more than any web page. It's a short animation followed by a static black screen, which uses very little. On an OLED phone a black screen is close to the most efficient thing you can display.
Can I get in trouble for using it?
It's harmless, but think about timing. Convincing someone their phone is about to die when they're navigating somewhere, waiting on a call, or holding a boarding pass turns a joke into a genuine problem. Own up fast.
How do they get out of it?
Tap the screen, or press Esc on a keyboard. Nothing is locked and no setting was touched, so there's nothing to restore.