PUBG Mobile battery drain and iPhone heat are usually tied to the work a long, graphics-heavy match asks of the screen and processor. Start by lowering the game’s graphics preset and frame rate, reduce screen brightness, and avoid playing in direct sun or while the phone is charging if it is already getting hot. A warm iPhone during an intensive game can be normal; if iOS shows a temperature warning, stop playing, turn the phone off, and let it cool in a shaded, cooler place.
The steps below use PUBG Mobile and Apple support guidance. They do not promise a fixed percentage of battery savings: results vary with iPhone model, battery condition, game settings, room temperature, and play pattern.
PUBG Mobile renders a detailed, fast-moving game scene continuously. Higher graphics quality and a higher frame-rate setting ask the phone to do more work, while the bright display also uses power. Apple lists graphics-intensive games among the activities that can make an iPhone feel warm. Heat may lead iOS to dim the display, slow or pause charging, weaken cellular signal, or reduce frame rates to protect the device.
Some warmth during a match is different from an iOS temperature warning. If you see no warning, Apple says you can keep using the device; if the phone feels uncomfortably hot or performance becomes erratic, take a break and let it cool. Do not rely on a fan app or an exact “safe” battery-drain percentage—apps cannot cool the phone’s hardware, and normal consumption varies.
If the iPhone displays a temperature warning screen, end the session. Turn the iPhone off, move it away from direct sunlight or another hot spot, and allow it to cool before restarting the game. Do not keep playing through the warning or try to charge through it. Apple designs iPhone for use in ambient temperatures from 0° to 35° C (32° to 95° F); long exposure to hotter conditions can affect battery life.
If there is no warning and the phone is simply warm after a match, move on to the settings below. Heat that continues after the game is closed, occurs during light use, or comes with repeated shutdowns deserves a separate battery or service check.
From the game lobby, open the menu at the lower right, choose Settings, then Screen settings. PUBG Mobile’s support instructions recommend selecting a lower graphics option such as Smooth or Balanced, then lowering the FPS/frame-rate setting to reduce heat and battery use. The exact labels and available choices can vary by game version and device.
Try one change at a time. Start with a lower graphics preset; if the iPhone still heats up quickly, reduce the frame rate one step. Play a short casual round or use Training Mode to see whether the image remains comfortable for you. Avoid choosing the highest graphics and FPS options just because your iPhone offers them—the best balance depends on the model and conditions.
Lower display brightness to a comfortable level from Control Center. This reduces the display’s power demand and can make the phone easier to use in a dimmer room. Brightness changes do not replace lowering PUBG’s graphics settings, but they can help when the screen is brighter than the room requires.
Low Power Mode reduces background activity and can extend battery life when charge is low. On iPhone 15 and later, open Settings > Battery > Power Mode; on iPhone 14 and earlier, open Settings > Battery and switch it on. It also changes some system behavior, including display brightness and Background App Refresh, so test it in a casual session if smoothness matters. Treat it as a battery-saving option, not a dedicated PUBG cooling switch.
When practical, start a long session with enough charge and play unplugged. Gaming and charging can each warm the device; combining them can add heat during a long session. If the iPhone becomes hot while charging, stop the match and let the phone cool. Keep it out of direct sunlight, away from hot cars, and in a comfortably cool, ventilated room. A short break between matches gives the device time to shed heat.
If iOS displays “Charging On Hold,” follow the message and move the device to a cooler place. Do not cover the phone with bedding or place it in a refrigerator or against ice; let it return to a moderate room temperature naturally.
To see whether PUBG is the main source of drain, open Settings > Battery. The Battery screen shows usage information; on current software, View All Battery Usage can show app use across recent days. Compare like with like: a long play session naturally uses more charge than a brief one, so the chart is a clue rather than a diagnosis.
Check Settings > Battery > Battery Health or Battery Health & Charging (the label depends on the iPhone and iOS version). If iOS reports that battery health is significantly degraded or recommends service, contact Apple Support or an Apple Authorized Service Provider. Update iOS and PUBG Mobile through their official update channels when convenient; a major software update can temporarily warm the phone, so let it finish and cool before starting another long match. Restart only if the game is stuck or behaving abnormally; routine restarts and cache clearing are not proven ways to reduce normal in-game battery use.
| What you notice | What to do next |
|---|---|
| The phone is warm only during PUBG, with no warning | Lower graphics and FPS, dim the screen, and take breaks. |
| The display dims, frame rate drops, or charging pauses | Move out of the heat or sunlight and let the iPhone cool. |
| An iOS temperature warning appears | Turn the iPhone off, move it to a cooler shaded place, and wait for it to cool. |
| Battery drains quickly outside the game too | Review Battery usage and Battery Health; seek Apple service if iOS recommends it. |
Not by itself. Low Power Mode limits background and display activity to save charge, but PUBG’s graphics and frame-rate settings are the direct game-side controls PUBG Mobile recommends for lowering heat and consumption. Start there, then use Low Power Mode if extending the remaining charge is more important than keeping every system feature unchanged.
Occasional warmth during an intense match is expected. Stop using the phone when iOS shows a temperature warning. If heat or fast drain continues after PUBG is closed, the iPhone shuts down unexpectedly, or Battery Health recommends service, contact Apple. For a persistent problem limited to PUBG Mobile after reducing graphics and FPS and updating the app, use the game’s in-app support option.
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