Troubleshooting
Topics:
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Handling swollen Lithium-ion batteries
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Dell SupportAssist Pre-boot System Performance Check diagnostics
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•
•
Recovering the operating system
•
•
Backup media and recovery options
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•
Drain residual flea power (perform hard reset)
Handling swollen Lithium-ion batteries
Like most laptops, Dell laptops use lithium-ion batteries. One type of lithium-ion battery is the lithium-ion polymer battery.
Lithium-ion polymer batteries have increased in popularity in recent years and have become standard in the electronics industry
due to customer preferences for a slim form factor (especially with newer ultra-thin laptops) and long battery life. Inherent to
lithium-ion polymer battery technology is the potential for swelling of the battery cells.
Swollen battery may impact the performance of the laptop. To prevent possible further damage to the device enclosure or
internal components leading to malfunction, discontinue the use of the laptop and discharge it by disconnecting the AC adapter
and letting the battery drain.
Swollen batteries should not be used and should be replaced and disposed of properly. We recommend contacting Dell product
support for options to replace a swollen battery under the terms of the applicable warranty or service contract, including options
for replacement by a Dell authorized service technician.
The guidelines for handling and replacing Lithium-ion batteries are as follows:
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Exercise caution when handling Lithium-ion batteries.
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Discharge the battery before removing it from the system.
To discharge the battery, unplug the AC adapter from the system and operate the system only on battery power. When the
system will no longer power on when the power button is pressed, the battery is fully discharged.
●
Do not crush, drop, mutilate, or penetrate the battery with foreign objects.
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Do not expose the battery to high temperatures, or disassemble battery packs and cells.
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Do not apply pressure to the surface of the battery.
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Do not bend the battery.
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Do not use tools of any type to pry on or against the battery.
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If a battery gets stuck in a device as a result of swelling, do not try to free it as puncturing, bending, or crushing a battery
can be dangerous.
●
Do not attempt to reassemble a damaged or swollen battery into a laptop.
●
Swollen batteries should be returned to Dell in an approved shipping container (provided by Dell), to comply with
transportation regulations or disposed at an approved recycling center.
Contact Dell product support at
for assistance and further instructions.
●
Using a non-Dell or incompatible battery may increase the risk of fire or explosion. Replace the battery only with a
compatible battery purchased from Dell that is designed to work with your Dell computer. Do not use a battery from other
computers with your computer. Always purchase genuine batteries from
or otherwise directly from
Dell.
Lithium-ion batteries can swell for various reasons such as age, number of charge cycles, or exposure to high heat. For more
information on how to improve the performance and lifespan of the laptop battery and to minimize the possibility of occurrence
of the issue, see
Dell Laptop Battery - Frequently Asked Questions
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Troubleshooting
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Summary of Contents for Inspiron 5421
Page 6: ...Chapter 6 Getting help 127 Contacting Dell 127 6 Contents ...
Page 14: ...Major components of your system 1 Base cover 14 Removing and installing components ...
Page 21: ...Removing and installing components 21 ...
Page 70: ...70 Removing and installing components ...
Page 72: ...72 Removing and installing components ...
Page 73: ...Removing and installing components 73 ...
Page 78: ...78 Removing and installing components ...
Page 79: ...Removing and installing components 79 ...
Page 82: ...82 Removing and installing components ...
