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Introduction
ATo ensure optimal laptop performance, a fully functional battery should be poweringpower the laptopdevice. If your laptop is losing its abilitystruggling to holdmaintain a charge, rapidly depletes its battery, or has nofails to charge entirely, it may indicate a declining battery health that requires attention. AIn such cases, a battery replacement maymight be necessary to restore reliable power. Before using this guide, check the [[Lenovo ThinkPad L390 Battery Not Charging|troubleshooting|new_window=true]] page as battery issues could be the cause of a faulty charger or port.
This guide provides instructions on how to replace the battery and restore functionality if your battery is not holding a charge.
Before following this guide, consider visiting the [[Lenovo ThinkPad L390 Battery Not Charging|troubleshooting page|new_window=true]] for additional insights. Battery problems can sometimes result from issues with the charger or charging port, rather than the battery itself. By ruling out these factors, you can ensure that battery replacement is the most appropriate solution..
***Note***:
* Before beginning this guide, make sure to power off your laptop completely and disconnect from any external power source.
* Some parts are small and can be easily lost, so place them in a safe place.
* Damaged batteries can cause fires or other dangerous issues if not properly disposed of. If the battery appears swollen, follow [[link|https://www.ifixit.com/Wiki/What _to _do _with _a _swollen _battery|follow proper procedure|new_window=true]] to keep yourself safe.