Swollen Battery on Framework 13 After 8 Months — Refused Warranty

[Adrian_Joachim]

@Charlie_6

I had a 2000’s laptop that it’s battery suddenly failed without any sign. After more than 10years left in the darkest corner I decided to find out after I gained enough knowledge about rechargeable batteries because of my DIY drones hobby. I took it apart and I smelled se burnt PCB. It’s likely the BMS chip or a MOSFET has burned out.

Fried bms is rare, you’d still need speciffically fried bms and charge controller to get overcharging though.

@Charlie_6

Today’s battery has better capacity but the reliability and safety have gone worse. Today most devices have “charge to 80%” and other battery preservation techniques but we still see battery swelling on a daily basis. I noticed that on recent smartphones, the “full speed charging temperature range” becomes much narrower. They also reduce current far before the voltage limit, unlike a decade ago where a almost perfect CC-CV charging is employed.
Correct me if I’m wrong, I could just be very unlucky in recent years and used devices with poor quality

While there may be something to this it is likely also a lot of survivorship bias. I am pretty sure there are a bunch of very good cells made today, which ones they are we’ll see in 10 years when they are still going XD. There were also a lot of complete stinker cell designs but they are all dead by now. We definitely do run them a lot harder these days. The whole temperature fast charging stuff is neat, unfortunately we tend to use the better understanding of the chemistry to just run it closer to the red line.

But the market has decided it wants thin devices so here we are.

Some day I will make a custom fw 13 bottom case that’s just filled with 18650s XD