How to repair laptop battery that is not charging?


I often get asked by my clients ‘How to repair a laptop battery that is not charging?’

Laptop batteries are integral to the performance of laptops. If your laptop battery is not charging properly, there are several causes and solutions you should explore before buying a new battery.

One of the most common problems with laptop batteries is that they do not power up at all or quickly lose their charge after being fully charged. The main cause for this problem is that the battery has outlived its useful life span. Batteries have a designated number of charges/discharges before they become unusable, anywhere from 300-500 full cycles, but it varies depending on the manufacturer’s specifications. Your other option is to replace or recharge your current battery.

However, if you want to take advantage of your laptop’s portability without draining your wallet, follow these simple steps:

Remove the battery pack

Remove the battery pack and let your laptop sit for at least an hour to ensure the motherboard has no remaining power. Press and hold the ‘Power’ button for about 4 seconds, then release it. This will drain any leftover electrical charge from the computer’s memory.


Clean battery contacts

Locate the battery jack on your laptop (located on the underside of the unit). Carefully disassemble the laptop until you get to the main circuit board where you can gain access to the jack. It is best to use a small Phillips head screwdriver or something similar so as not to scratch the motherboard. Unplug and set aside all screws leading up to this point and lift-off cover carefully so as not to damage any of the internal wires or components.

Gently use an alcohol moistened cotton swab to clean the surface of both ends of your battery’s contact points. Battery contact points are located on a small rectangular chip which is usually a gray block with two contacts facing down and one on top. If you find other metal chips, make sure they are clean as well. Wipe gently over all chips until the residue has been removed from them completely.

Check for corrosion

In addition, many times what appears to be a malfunctioning battery is the result of corrosion under the circular contact stickers on batteries that do not have removable storage components (that is, those without memory). Corrosion causes these circular stickers to ‘disconnect’ from the battery, which directly impacts the ability of the battery to charge. In this case, gently scrape away any corrosion on either side of these stickers with a small flat-head screwdriver working from the center out to the edges.

Depending on how much corrosion is present under these circular contact points will determine whether or not you need to replace your battery altogether. If it’s pretty bad, consider buying a new one as most laptops do not allow for their batteries to be taken off and cleaned beyond taking them out of the laptop itself. Without being able to remove them from inside the system there is no way that you can repair an internal issue such as corroded metal contacts.

If this is too daunting for you, then get a reputable laptop cleaning service to do this for you.

Lack of power

Now that your battery is removed, you can look at what is causing your laptop’s lack of power.   If there are any signs of corrosion or rust on either your cables or terminals, clean them off using some sandpaper after first disconnecting them. Once you have done this, disconnect them again and coat them generously with dielectric grease before reconnecting them. This should help prevent future build-up.

Next, inspect for any damage to either your charging cord or wall outlet as these are also common problems if they have recently been jarred or if there is visible damage. You can attempt to clean them with a cloth soaked in rubbing alcohol, though this should only really be done as a last resort if you don’t have any replacement parts available.

If your laptop still won’t charge even after performing these simple tasks, then it’s possible that the circuit board inside may be damaged. It is typically worth paying for a laptop repair in Melbourne unless your laptop is under warranty.

How to remove your laptop battery?

Before removing your current battery, perform a google search on your laptop model number along with the following keywords: “remove the battery” and/or something similar to determine how difficult removing it will be.

Once you have determined that you can remove the battery, start by opening up the laptop all the way so that you can see where your battery is located. You should see either this set of screws holding it in place or some kind of lock keeping it secured. Remove these screws carefully if you are using any metal implements as laptops often have parts that are connected though they may not look like they are.

The battery should then come right off, depending on whether or not there is a latch keeping it in place inside. If there is one, make sure you release it completely before removing the battery. If you do not, the latch may keep the battery from coming out all the way which might make it difficult to work with later on.

In most cases, replacing your battery will solve the problem. To do so, turn off your laptop and remove all peripherals from its ports. Disconnect the AC adapter and remove the battery. Locate your laptop’s manual (if you can’t find it, search online for “manual” followed by the make and model of your laptop) to determine how to correctly open its case.

Once inside, locate the existing battery. There should be a bar or label denoting which end is positive and which end is negative (most batteries are marked with “+” signs; some have lightly colored bumps at one end). Be sure not to touch them once they’re disconnected from power! Carefully disconnect all cables attached to this now useless component, including any tape securing it in place, then gently slide it out of its bay.

Replacing Your Battery

The laptop battery needs to be replaced with a new one that has equivalent specifications. The capacity of the replacement battery should be no less than the original capacity, and its voltage rating must equal or exceed the original battery’s voltage rating. Additionally, you need to ensure that your laptop is compatible with this type of battery; otherwise, the laptop may not function properly with it installed.

Compatible Batteries

If you’re based in Melbourne, offers a wide range of products for many different laptops makes and models. They offer only name-brand products which have been tested for compatibility with your system before the sale.

Before you purchase a replacement battery, the battery must be compatible with your laptop. Batteries are specific to certain makes and models of laptops based on things like voltage rating, capacity (mAh), size (length, width, depth), aspect ratio (laptop width vs height), and connector type. Each model varies; therefore, not all batteries will fit each laptop even though they may look alike or even fit in the space provided by your original battery. This is especially true of batteries for refurbished/refurbished units since these tend to vary slightly.

Other than ensuring compatibility, it’s also important to ensure that you use the right type of battery for replacement. Generally speaking, although not always true, batteries are picky about whether they can be used as replacements or not. If your battery is built-in and cannot be removed (for instance, an internal laptop battery), then it must be replaced with a unit that matches the specs exactly—there is no choice in this case.

I am a computer engineer holding a bachelor's degree in Computer Science, complemented by a Master's in Business Administration from University of Strathclyde, Scotland. I currently work as a Senior IT Consultant in Melbourne, Australia. With over 15 years of...