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Fix Your Laptop Battery: 8 Methods

Posted by John 30/12/2023 0 Comment(s)

Fix Your Laptop Battery: 8 Methods

Laptop batteries allow us to use our devices untethered and on-the-go. However, through normal wear and tear, improper care, or manufacturing defects, laptop batteries can begin to underperform or stop working entirely. An underperforming or dead laptop battery can cause serious disruption to our productivity and usage.


In this comprehensive guide, we will cover the most common laptop battery faults and provide solutions to diagnose issues, extend battery lifespan, troubleshoot dead batteries, determine when replacement is needed, purchase new batteries, install replacements, and properly recycle old batteries.


Laptop batteries are complex pieces of hardware and can fail due to various factors. By understanding the inner workings of lithium-ion batteries and how they interface with your laptop's power management systems, you can better prevent and troubleshoot any problems that may arise. We will cover the main factors that contribute to reduced laptop battery life and sudden failure.


With laptops being such important productivity tools, it is critical to properly maintain your device's battery and quickly address any performance issues or failure. By learning diagnostic techniques, preventative care, and when replacement is needed, you can maximize your laptop's uptime and mobility. We will provide actionable solutions to breath new life into your laptop battery or determine the right time to invest in a replacement.


Properly disposing of depleted laptop batteries is also important for safety and the environment. We will overview responsible battery recycling and disposal methods. Follow along as we thoroughly cover how to keep your laptop battery in optimal condition or address any issues that arise. Let's get started!


Causes of Laptop Battery Issues


There are several reasons why a laptop battery may stop holding a proper charge or fail entirely. By understanding the most common causes of laptop battery problems, you can try to prevent them and more easily diagnose issues. Here are some of the top reasons laptop batteries can malfunction:

  • Age and Regular Wear - Like all batteries, lithium-ion cells degrade over time. After hundreds of charge/discharge cycles, the chemicals inside the battery experience wear and can no longer store as much energy. Most laptop batteries last 2-3 years.
  • Overheating - Heat is very detrimental to the sensitive chemistry inside lithium-ion batteries. High temperatures during charging, discharging, or storage can accelerate battery wear and reduce lifespan.
  • Overcharging - Keeping a laptop plugged in at full charge all the time can strain the battery. The fluctuating high voltage levels put extra stress on the cells.
  • Physical Damage - Drops, impacts, punctures, or other external forces can damage the battery and cause leaks, shorts, or detachment from connectors.
  • Incompatible Charger - Using a charger that does not properly match your laptop's power needs can overload or under-charge the battery over time.
  • Software Issues - Glitches in the laptop's power management firmware can sometimes provide incorrect battery status or charge levels.
  • Manufacturing Defects - Improperly fabricated batteries may contain flaws or impurities that shorten their usable life.


By monitoring your battery's performance, avoiding excessive heat, periods of 100% charge, and physical damage, you can maximize its lifespan. But degradation is inevitable after a few years of regular use. Let's look at solutions for diagnosing battery issues.


How to Diagnify Laptop Battery Issues


If you notice your laptop battery is no longer holding a full charge or powering the device for very long, there are several ways to diagnose potential issues:


  • Check Battery Health - Most laptops have a battery health meter in the OS power management settings or a first-party diagnostics app from the manufacturer. This will show charge capacity and cycles.
  • Test Battery Voltage - Use a multimeter to check if the battery is outputting its rated voltage. Significant deviations usually indicate a bad cell.
  • Run a Battery Report - Windows has a built-in battery calibration tool that provides adetailed report about capacity, health, voltage, and usage.
  • Check for Swelling/Leaks - Open the laptop case and visually inspect the battery for any deformation, swelling, splitting seams, or leaking fluid which are signs of failure.
  • Try an Alternate Battery - Use a known-good replacement battery to determine if the issues stem from the unit itself or a deeper system problem.


These tests should help pinpoint if your laptop battery needs replacement or if there is an underlying issue with power management components or software.


Extending Laptop Battery Life


To maximize the usable lifespan of your laptop battery and avoid premature failures, there are several steps you can take:

  • Lower Screen Brightness - Dimming your screen is one of the best ways to gain extra hours of battery time per charge.
  • Disable Unneeded Apps - Close or uninstall apps that constantly run in the background and drain battery.
  • Avoid Overcharging - Don't leave your laptop plugged in at 100% charge for prolonged periods of time.
  • Prevent Overheating - Keep your laptop on flat cool surfaces and avoid extensive high-demand tasks while on battery.
  • Perform Regular Calibrations - Do a full charge/discharge/recharge cycle every 1-2 months to keep battery readings accurate.
  • Replace When Needed - When your battery capacity drops below 80%, it's time to buy a replacement to regain runtime.


With proper care and maintenance, you can squeeze the maximum lifespan from your laptop battery before needing a replacement. But even well-cared for batteries will degrade eventually.


Troubleshooting Dead Laptop Batteries


If your laptop suddenly won't turn on when unplugged from AC power, there are some troubleshooting steps to attempt bringing a dead battery back to life:

  • Try Charging for Longer - Leave the apparently "dead" battery plugged into the charger for several hours to see if it will take a charge.
  • Reset and Reconnect Battery - Disconnect the battery, hold down laptop power 10 secs to drain flea power, reseat battery and try charging again.
  • Test with Alternate Charger - Try charging the battery using a different known-good charger to rule out a bad adapter.
  • Remove Battery & Boot Up - Remove battery completely and see if laptop powers on from wall power alone, indicating an issue with the battery unit.
  • Try Battery Reset Hole - Some laptop batteries have a small pinhole that can be used to reset battery controllers when faults occur.
  • Check for Damage - Examine battery for any signs of physical damage that could have caused a malfunction.


With persistence, some batteries thought to be "dead" can be revived. But if no amount of troubleshooting works, it's likely reached the end of its usable life.


When to Replace a Laptop Battery


If you've diagnosed your laptop battery to be beyond reviving through troubleshooting, here are the signs it's time to replace it:


  • Won't Hold Any Charge - If the battery immediately drops to 0% even after confirmed charging, it's no longer functioning.
  • Swelling/Splitting/Leaking - Any deformation, swelling, splitting seams or leaking/corrosion indicates a dangerous battery that should immediately be replaced.
  • Charge Capacity Below 50% - If your battery health meter shows it can only hold 50% or less of original max charge, it's near the end of usefulness.
  • Random Shutdowns - Frequent random power-offs with 30%+ charge left means the battery can no longer provide stable power delivery.
  • Noticeably Short Runtime - If your device can only run for half or less of the original duration on a full charge, battery replacement is overdue.
  • Old Age - Any battery more than 3 years old that shows wear is a prime replacement candidate to restore runtime.


Don't delay replacing severely degraded batteries that show these issues, as operational reliability and battery safety cannot be maintained. Next we'll look at shopping for a proper replacement.


Buying a Replacement Laptop Battery


When selecting a replacement laptop battery, make sure to:


  • Match the Replacement - Verify battery voltage, connector type, dimensions, and capacity matches your original. An incompatible battery can damage your system.
  • Shop from Reputable Retailers - Avoid cheap no-name batteries of unknown quality. Purchase from trusted electronics and OEM suppliers.
  • Consider a Higher Capacity - You can safely go with a battery of higher capacity (mAh) than the original for increased runtime.
  • Check Customer Reviews - Read experiences from other buyers to gauge the battery quality and expected lifespan.
  • Look for Certifications - Search for units that are UL, UN38.3, RoHS, CE and/or FCC certified for safety.
  • Include Install Tools - Opt for batteries that include the plastic spudgers or tools required to safely open your laptop chassis for installation.


Installing a New Laptop Battery


Once you have your replacement laptop battery in hand, here are the steps to safely install it:


  • Disconnect AC Power - Shut down the laptop, unplug the charger and remove any peripheral cables.
  • Follow Manufacturer Instructions - Refer to your laptop's hardware manuals for the proper battery removal procedure. Steps vary.
  • Release Battery Latches - Use plastic spudgers to gently release any locking tabs or slide latches securing the battery.
  • Disconnect Battery Cable - Detach the battery connector cable from the motherboard port before lifting out old battery.
  • Place New Battery - Slide the new battery into empty compartment, pressing down firmly to seat properly. Reattach battery cable.
  • Secure Battery - Press down and allow locking tabs to snap in place or slide latches back into the locked position.
  • Replace Access Panels - Carefully reseat any chassis panels, covers, or doors removed to access the battery compartment.
  • Reconnect AC Power - Plug laptop back into the wall charger. Power it on and confirm new battery is detected properly.


Follow all manufacturer instructions closely when swapping laptop batteries. Physical damage or cable disconnections can occur if not removed and installed carefully. Take things slow and steady.


Recycling and Disposing of Old Laptop Batteries


Once you've replaced your faulty or depleted laptop battery, proper recycling or disposal is important:


  • Find Local Recycling Centers - Many hardware and electronics stores offer battery take-back programs. Contact local municipal household hazardous waste facilities.
  • Review Transportation Regulations - Lithium-ion batteries when shipped alone can be classified as hazardous materials. Follow all carrier guidelines.
  • Prevent Environmental Contamination - Never throw old batteries in the trash. Take them to a regulated recycling center to avoid groundwater leeching.
  • Tape Battery Terminals - Cover the positive and negative terminals with electrical tape to prevent dangerous shorts if batteries are stored or stacked before recycling.
  • Consider Battery Buyback Programs - Some retailers and manufacturers will give a partial refund or store credit if you return your old laptop battery to them for responsible recycling.


Properly disposing of lithium-ion batteries is important for safety and environmental reasons. Be sure to deposit your old laptop batteries at regulated waste management sites.




Laptop batteries provide invaluable untethered power to our devices. But through age, mishandling, or defects batteries eventually fail. By learning the main causes of battery issues and how to diagnose them, you can revive or maintain batteries. With proper maintenance and care, laptop battery lifespan can be extended but will inevitably need replacement after 2-3 years of regular use.

Shop smart when buying replacement batteries and take safety precautions when installing them. Finally, deposit depleted batteries at e-waste facilities so they can be safely recycled. Follow these tips and you'll always have power on the go!