u/WXDkurucu

Hey everyone,

I’ve been using my brand new OnePlus 15 for about two weeks now (only 9 battery cycles so far). A few days ago, I used the phone under some pretty heavy conditions for the first time, and I wanted to get your technical insights on whether this could cause any long-term degradation.

During a school soccer final match, I recorded continuous 4K 60FPS video for about 50 minutes with OIS and HDR enabled. The ambient temperature was around 28°C, but we were directly under intense, unshaded sunlight the entire time. Right after that, I continued taking photos and short clips for another 30 minutes.

During the recording, the phone naturally got very hot, the screen brightness dimmed automatically, and I eventually got the system notifications saying "Device temperature is too high. Some features may be unavailable" and "Flashlight cannot be used."

Right after stopping the camera recording, I immediately hopped into a game just to check the real-time temperatures through Game Assistant. As you can see in the screenshot, the battery was at 52°C. Even if the phone warmed up gradually during the first 10–20 minutes of that session, it still spent a solid 30–40 minutes hovering around 50°C+. The CPU must have been well over 100°C during this time, which is why I am incredibly anxious.

Today, I ran a thorough battery test from 85% down to 30%, and surprisingly, I managed to get over 9 hours of Screen-On Time (SOT), including 40 minutes of PUBG Mobile at high frame rates. The device feels completely stable, standby drain is virtually zero, and battery health in settings still shows 100%.

Given that the phone's safety limits kicked in (dimming the screen, blocking the flash) and the CPU throttled to protect itself, do you think a one-time exposure to 52°C battery heat for an hour caused any permanent structural damage to the lithium chemistry? Or did the OnePlus cooling system and built-in safeguards fully do their job?

Would love to hear your thoughts, especially from those who use the device for heavy camera sessions or gaming in warm environments. Thanks!

Hey everyone,

I’ve been using my brand new OnePlus 15 for about two weeks now (only 9 battery cycles so far). A few days ago, I used the phone under some pretty heavy conditions for the first time, and I wanted to get your technical insights on whether this could cause any long-term degradation.

During a school soccer final match, I recorded continuous 4K 60FPS video for about 50 minutes with OIS and HDR enabled. The ambient temperature was around 28°C, but we were directly under intense, unshaded sunlight the entire time. Right after that, I continued taking photos and short clips for another 30 minutes.

During the recording, the phone naturally got very hot, the screen brightness dimmed automatically, and I eventually got the system notifications saying "Device temperature is too high. Some features may be unavailable" and "Flashlight cannot be used."

Right after stopping the camera recording, I immediately hopped into a game just to check the real-time temperatures through Game Assistant. As you can see in the screenshot, the battery was at 52°C. Even if the phone warmed up gradually during the first 10–20 minutes of that session, it still spent a solid 30–40 minutes hovering around 50°C+. The CPU must have been well over 100°C during this time, which is why I am incredibly anxious.

Today, I ran a thorough battery test from 85% down to 30%, and surprisingly, I managed to get over 9 hours of Screen-On Time (SOT), including 40 minutes of PUBG Mobile at high frame rates. The device feels completely stable, standby drain is virtually zero, and battery health in settings still shows 100%.

Given that the phone's safety limits kicked in (dimming the screen, blocking the flash) and the CPU throttled to protect itself, do you think a one-time exposure to 52°C battery heat for an hour caused any permanent structural damage to the lithium chemistry? Or did the OnePlus cooling system and built-in safeguards fully do their job?

Would love to hear your thoughts, especially from those who use the device for heavy camera sessions or gaming in warm environments. Thanks!