An LG Nexus 5 phone with the back cover removed and the internals visible.
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Replacing a LG Nexus 5 Battery: A Detailed DIY Walkthrough

I recently had to replace the battery on my LG Nexus 5. Where I last year needed to repair the power button, it was now the battery’s turn to be swapped out.

For anyone else who also has problems with very little screen-on-time on their Nexus 5 due to an old battery, I will show the battery replacement process for the Nexus 5 in this article.

Can You Replace the Nexus 5 Battery by Yourself?

Yes, you can. Replacing the battery of this phone is a straightforward process. As long as you follow the instructions below, there is basically nothing that can go wrong.

When Should You Replace the Battery?

Generally most modern lithium-ion phone batteries last about 500 charging cycles. After that, the performance of the battery starts to degrade. This is a gradual process and typically happens after around two years of using the phone.

You will be able to tell when it is time to replace the battery once you get significantly less SoT (screen-on-time) than you used to get when the phone was new.

Can You Replace the Battery With One With a Higher mAh?

Not really. There are some unofficial batteries with 2450 mAh capacity (vs. the 2300 mAh that the stock battery has) available, but that will not make a big difference.

An easier way to have more battery power available would be to carry a portable charger. These are always useful to have on you and can be used to charge all kinds of USB-powered devices.

Is Replacing the Battery Worth It?

Absolutely. As long as you are still happy with the performance of the phone, there is no reason to buy a brand new phone instead of just replacing the battery.

While a replacement battery is not going to last as a long as a new phone, it costs significantly less. A replacement battery for the Nexus 5 costs around $20-30, where as a new phone costs hundreds of dollars. You could replace the battery several times over for that money.

How to Replace the Nexus 5 Battery

What You’ll Need

Removing the Back and Internal Covers

A hand using a guitar pick to open the back cover on an Nexus 5 phone.
Remove the back cover from the phone. Make sure that you turn the phone off first. To remove the back cover, take a prying tool and insert it between the phone and the back cover. Then work around the outer edge of the phone to detach the back cover.
The back cover of an LG Nexus 5 next to the phone itself.
Take the back cover off and put it aside.
Six circled screws on the inside of a partially disassembled Nexus 5.
Use a small Phillips-head screwdriver to remove the six circled screws in the image.
Take off the circuit board cover. Keep an eye on the screws in order not to lose them.

Removing the Battery

Use a thin non-metal tool to detach the battery connector. You can use a prying tool or a nylon spudger.
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Avoid using a metal tool in this step. Shorting out a lithium-ion battery can be very dangerous.
Detach the connector of this long cable the same way. Gently move the cable upwards so that there is enough space to remove the battery in the next step.
Lift the battery out. It is secured with adhesive on the back, and it might take some effort to take off. If you used the phone beforehand it will be easier, because the heat of the phone softens the adhesive.
A partially disassembled LG Nexus 5, with next to it the battery.
Place the old battery next to the phone.
A swollen phone battery next to a new non-swollen battery.
The old Nexus 5 battery next to the new one. The old battery was so old that it had started to swell. Over time the chemical reaction in the battery breaks down. This can result in the formation of gas, which swells up the battery.
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Be very careful when handling and dealing with a swollen battery. Puncturing it can cause it to catch fire or explode.

Reassembling the Phone

You can now insert the new battery into the phone, and follow the above instructions in reverse to reassemble the Nexus 5.

A hand holding an LG Nexus 5 phone which is powering up.
Test the phone after reassembling to make sure that it works properly.

When placing the rear cover back onto the phone, make sure to apply pressure all over the cover to ensure that the NFC circuit in the cover makes a solid connection with the phone circuit board.

Please dispose of the old battery appropriately.

A Summary of the Battery Replacement Process

  1. Turn the Nexus 5 off.
  2. Remove the back cover.
  3. Remove the internal circuit board cover.
  4. Detach the battery cable.
  5. Detach the long flat cable that is placed on top of the battery.
  6. Take the battery out.
  7. Insert the new battery.
  8. Reassemble the phone by completing the above steps in reverse order.
  9. Dispose of the old battery in an environmentally friendly way.


After replacing the battery of the Nexus 5, it has a lot more screen-on-time than it did before. I wouldn’t say it is as much as when the phone was brand new, but it is certainly a big improvement over what the swollen battery gave me.

The reason that the battery life is not as good as new, is that the replacement battery was produced a couple of years ago. Generally, replacement batteries for a phone are not produced anymore after a while. Therefore, the ones you can buy are older, and despite not having undergone many charging cycles they still degrade while they lie in a warehouse somewhere.

In the end, replacing the battery was worth it.

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Tim is an expert in 3D printing, laser cutting, and 3D scanning with a background in mechanical engineering and product design. With decades of experience, he offers in-depth insights and practical solutions, contributing to his reputation as a trusted resource for DIY enthusiasts and professionals.

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