What Causes Laptop Battery Damage. My grandmothers phone and my laptop both had this problem. When it does this your device may heat up and damage your battery.

Once a battery starts to swell it is considered compromised in every way and a replacement is the only way to avoid further damage to your laptop. Cleaning and reseating the battery. If your laptop has a removable battery disconnecting it and keeping the computer plugged into its charger while performing system-intensive actions such as gaming or video editing can help prevent heat damage to the battery.
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Neither the contacts nor the latches are designed for regular removal of the battery. If your laptop has a removable battery disconnecting it and keeping the computer plugged into its charger while performing system-intensive actions such as gaming or video editing can help prevent heat damage to the battery. In order to operate properly in the long term your laptop computer needs to be able to have its battery recharged and be able to maintain a charge when not plugged in. A laptop is designed to work with a battery.

