Chosen Solution
Hey Guys!
I’ve just bought broken watches. The guy sad that they stopped charging. I thought that the battery is the problem, so I bought them. After opening the device I immidiately noticed green, white or maybe blue type of matter. On first sigh It didn’t look like it’s corrosion. Have you ever seen this? Is it battery acid? Any possible ideas how to fix it? Update (08/26/2019)
As you can see, that greenish matter is only on the battery connector cable, on the plastic cable, so in case of water leak I would expect corrosion on metalic pieces. Secondly, the green matter is only on the spot, where the battery cable touched the device, thats why I think it’s just battery acid, not water. When water leaks into device its characterstic would case leaking and making corrosion all over the whole device. Any tip for cleaning this possibly acid matter?
Your pics show a very badly blistered Lithium Ion battery! First take the battery outside and in a vented metal box so when it goes the gases can escape and also control any fire. The greenish corrosion is caused by chlorine or salt eating the exposed copper surfaces. The electrolytic used in Lithium Ion batteries (lithium hexafluorophosphate) leaves a white power. As the battery is blistered we know the battery has not ruptured yet so that was not the cause of the corrosion. But the chlorine water or salt water is conductive and can short the battery out causing it the overheat causing the blistering. Oftentimes the battery will push the display or the sensor outwards as these are not tightly attached.
