Battery Replacement Nuliie Breast Pump (YM-8806)

I got a pair of breast pumps second-hand: Nuliie YM-8806. They work very well, but the battery inside them was already old and weak.

I contated their support and asked for the battery dimentions but surprise it was all AI usesless chat. The proposed solutions were: try a warranty replacement (if they’re still under warranty) or just buy new ones.

So I basically had to open one pump twice just to measure the battery and order a replacement…

A small Philips screwdriver plus some leverage is needed to open the product.

I needed a soldering iron to adapt the battery connector, some shrink tube, and hot glue.

I had to do this twice with the first pump thanks to the cheap AI answer from Nuliie.

Remove the 2 Phillips screws and use some leverage to pull the top part open, a guitar pick or a credit card will also get the job done.

Once the top part is out of the way, gently pull out the motor and the solenoid valve, there’s no need to disconnect the wiring.

Then unscrew the two Phillips screws holding the bottom plastic piece.

Now you need to pull the plastic piece holding the PCB, and the PCB itself, away from the front panel. Do that while pulling and twisting the pieces to get them out.

For me, the best method is to push the display cover inward and take everything out in one piece.

With everything outside, you’ll see the battery at the bottom. I had to measure it to be sure, but the text on it indicates the battery type: “103040”.

At this point I reassembled it and ordered a fitting replacement battery.

With the new battery at hand, it’s time to finish the repair. Avoid touching the PCB with metallic or conductive tools while the old or new batteries are plugged in.

Gently separate the old battery from the bottom of the white plastic piece.

Remove the hot glue securing the battery connector and firmly pull the battery connector out of the PCB.

In my case, the connectors were different, so I had to cut the wires from both batteries and solder the new battery onto the old connector.

Always respect the polarity, inverting positive and negative will almost certainly produce some blue magic smoke and kill the electronics, and remember that Nuliie does not provide spare parts.

Reconnect the new battery, the pump will light all the LEDs for a second and should be ready.

Press the power button to check if everything works, and also connect a charger to verify that the new battery charges properly.

I secured my new battery with tape and some neoprene on the back, but you can just reuse the sponge-like material from the old battery. Also put a drop of hotglue on the connector.

Revert the opening process to reassemble the pump. Close it up and give it a charge.

Repeat this process with the second pump.

Done! You saved yourself €200 for a new pair of pumps and spared the environment some e-waste.