For context, my phone died this morning eventhough i went to bed with more than 50%. As a result my alarm did not ring and i woke up late for work. Utterly disappointed.
Hi Guys,
I want to assemble a Meshtastic or Meshcore solar powered device, but it seems that I cannot find accurate info about what to use. I find a lot of contradictory information.
So basically I have 4 x LiitoKala Lii-35A 18650 3500mAh 3.7V Li-Ion batteries that I want to connect in parallel.
I also bought a 5V - 20W solar panel, so that can push max 4A of energy throughput.
Between the batteries and the solar panel I want to install a solar charger controller and a BMS.
But I cannot find a charger controller that pushes more then 2A (CN3791) and 1A (the TP4056) but the panel is able to push 4A, nor I'm a able to find a BMS that works with parallel setups?
I see guys connecting 4 x TP4056 to get to 4A, but then again is that safe?
So is there somebody that can advise me on this part and maybe point out what to use to keep it uniform and safe?
Best regards!
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!
Hello All, I have a red light pad healing pad (infra- red and near infrared) that works by being attached to a controller that has a lithium ion battery.(electrical input 5V 2A. Battery capacity 3.65 V 2600 mAh, 9.49Wh. The battery is charged using a designated USB- C cable with a wall charger (I use the block from my MacBook pro).
I accidentally connected the lithium controller to my iPhone 15 with the phone USB-C cable. The phone was at 60% charged at the time and when I looked at it an hour later, it was drained to 3%.
Did I damage the battery of the controller? Is there a risk to the red-light pad in using the controller if it is damaged?
About a year ago I bought a used electric scooter for 150€. It was in ok condition but a bit of the battery has now suffered from water damage and I took the battery apart and ordered 40 new lithium ion batteries. The old battery pack had about 120 4,2V batteries and most of them are in good condition.
The only problem I have is that the old solder points could make it harder to spot weld the old batteries because of the old solder points. I wan't to try using a straight grinder with a non-conductive end. Is it a good idea, probably not but i've haven't come up with any other solution that is time effiecent.
Any ideas or solutions? It needs to be pretty flush so the current would not be limited
(Deleted the old post to change the title)
About a year ago I bought a used electric scooter for 150€. It was in ok condition but a bit of the battery has now suffered from water damage and I took the battery apart and ordered 40 new lithium ion batteries. The old battery pack had about 120 4,2V batteries and most of them are in good condition.
The only problem I have is that the old solder points could make it harder to spot weld the old batteries because of the old solder points. I wan't to try using a straight grinder with a non-conductive end. Is it a good idea, probably not but i've haven't come up with any other solution that is time effiecent.
Any ideas or solutions? It needs to be pretty flush so the current would not be limited