Replace Yi Dashcam Battery easily under 30 minutes!

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The Yi Dashcam does a decent job in recording your drive. But after a few years, the battery will start to fail. The dash cam will still work when powered via USB. But when not powered, my unit would weirdly power up and down until the battery is completely flat. It’s obvious that the original battery is dead. However, there’s no reason to throw it away as the dash cam still works fine. So, I went to find out which battery type it uses to replace the Yi Dashcam battery.

Yi Dashcam

Turns out it’s east enough to do-it-yourself. Here’s how you can do that same too.

What you will need to replace the Yi Dashcam battery

Obviously you need to purchase the replacement battery. The original battery is a 402035 (40mm x 20mm x 35mm) model with the specifications of 3.7v 240mAh 0.89Wh. You can find the exact same dimensions and rating. Alternatively, you can also find similar 3.7v Li-ion batteries with a ±20mmx35mm dimensions, like this one listed here which is supposed for the Logitech Mouse. There is enough space in the Yi dash camera to house batteries with a larger dimension.

Yi dashcam battery - old vs new

The specific battery I got from AliExpress is a 582535 3.7v lithium polymer battery with a 600mAh capacity. Just a note on buying batteries from AliExpress, it can take a while for the item to get shipped to you. My order took about a month to reach me.

582535 3.7v li-ion battery for yi dashcam

You will also need a toolkit to pry the back case and remove the screws. The Tekton Everybit Precision Tool Kit works fine for me, but the spudger tool is a little soft to pry out the case.

Tekton tool kit
Source: Amazon.com – https://amzn.to/35DbdyN

You can also consider getting the iFixit has a great Pro Tech Toolkit set. It’s one that I’ve been eyeing for some time now as it also has a great set of opening tools.

ifixit tech toolkit
Source: Amazon.com – https://amzn.to/3cRTsQs

Dismantling the dash camera to replace the battery

In following series of photos and descriptions would show you how I dismantled the YI Smart Dash Camera to replace the battery.

1. Pry open the back case

Where to pry open the yi dashcam case

I used a combination of my fingernails and the spudger tool to pry the back case out. I found that doing it from the corners worked pretty well. This is the hardest part of the replacement steps. It took me a few minutes to get it out, so do be patient. In the next photos, you can see where the tabs are.

yi dashcam back cover tabs

2. Remove the LCD panel holder

The LCD panel screws for the Yi dashcam

There are 4 screws that holds the LCD panel holder on the circuit board. You will need to remove the LCD panel from its holder first.

How the LCD panel is held on the Yi dashcam

Once you removed the screws, the LCD panel and its holder would come off. You don’t actually need to remove the LCD connector for the battery replacement. Also, put the LCD panel back to its holder to manage it easier in the next steps.

The Yi dashcam LCD panel connector goes through its holder

3. Remove the PCB

The screws and Wi-Fi antenna connector on the Yi dashcam

To remove the PCB, there are 2 screws to remove and the Wi-Fi antenna connector to unclip.

unclipped the Yi Dashcam WiFi antenna connector

Unhook the Wi-Fi antenna cable from the top of the PCB and you can lift up the circuit board from the front case. Do be careful as there are still some wires attached to the front case.

Yi dashcam PCB and cables

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4. Replace the battery

Removing the Yi dashcam battery

At this point, you can now replace the battery. Disconnect the battery connector from the circuit board and gently pull the battery from the front case.

Gently pull out the Yi Dashcam battery

With the original battery removed, you can see how much space there is actually for a larger battery. This is why the 583525 battery I got is able to fit.

The space to place the Yi dash-cam battery

I recommend attaching a double sided adhesive tape to stick the battery in place.

Attach a double-sided adhesive tape to the battery

Here’s how the new battery fits in the Yi Smart Dash Camera once it is fixed on to the front case.

New battery replaced on the Yi dashcam

I have also removed the foam from the old battery and pasted it on the new battery. The foam ensures that the battery does not touch the PCB. This is entirely optional but I thought it was good to do that same with the new battery.

Using the foam to space the battery from the PCB on the Yi Dashcam

You can see from the photos here that there is a lot of clearance space between the battery and the dash cam’s PCB.

Enough clearance for the larger battery on the Yi Dashcam
New battery installed on the Yi Dashcam

At this point, you just need to go back in reverse with the whole process. Remember to attach one plastic part that you need to screw between the LCD panel and the PCB.

Placing the plastic part back in place

5. Powering up the Yi Smart Dash Camera with the new battery

Connect the USB cable to power up the Yi dashcam

Before replacing the dash cam back into the back case, test out if the dash cam works with the new battery! It should power up as soon as you plug in the a USB cable connected to a power source. When you unplug it, the dash camera should continue to run for a while and you should see that the battery indicator is not empty. If everything works as expected, snap back the dash cam unit back into the back case.

New battery working on the Yi Dashcam

That is how you replace the Yi Dashcam battery!



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5 Responses

  1. Ken Ng says:

    This one might be a little bit too wide at 30mm. It could fit but it would be quite a tight squeeze I think. The width for the battery I got is 25mm and as you can see from the photos, there’s some but not that much space left on its sides.

  2. stab244 says:

    Hi, I have a replacement battery but the connector isn’t the same. The ones you suggested don’t seem to be in stock for Amazon and the connector doesn’t look right either. Would you happen to know what connector is needed?

  3. Ken Ng says:

    It is a JST connector and looks like you’re right. The one from Amazon comes with a 2-pin JST connector. The one on the camera is a 3-pin. One way around it is to cut the connector from the old battery and solder it to your new battery. It should work.

    Alternatively, I just searched Aliexpress again. The previous one that I bought is no longer available. But this one looks exactly the same as the one I got. https://a.aliexpress.com/_mKQ3bhA

  4. Harvinder says:

    Thanks for the hack, I did the same, but weirdly mine says it is connected to charge even though it is on battery, very weird

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