In one of the Slack teams I’m in, a colleague posted a photo of a battery he removed from a MacBook Air. He replaced the battery just fine, but one of the cells looked like it had been inflated like a balloon. I warned him to take care, and in the resulting discussion, realized it’s not common knowledge that it’s not just a defectively designed Samsung Note7 battery that can cause fires and damage.
If you believe the battery in your phone, tablet, or laptop has started to expand, unplug the device immediately if it’s plugged in, and turn it off if at all possible. Don’t charge or use it at all, because lithium-ion (Li-ion) batteries that are bulging have already bypassed built-in safeguards and are swollen with gases. Continued charging or use could lead to a runaway reaction that results in a fire or an explosion.
Macworld How-To Go to Source
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