Xiaomi Wireless Electric Toothbrush Battery Replacement

xutong

Xiaomi Wireless Electric Toothbrush Battery Replacement [Copy link]

 

 

The base, there are screws at the bottom of the base that are sealed with glue, just dig them out with a screwdriver

What is the MCU on the north side of the PCB?

The original battery was not working.

The battery was taken from the company's ECG demo board.

Replace the prince with a cat, and switch to the ecg demo board

qwqwqw2088

The circuit board is long enough.

sanhuasr

Recently, I changed the battery of the cervical vertebrae monitor to 902035, and took a look at various lithium-ion battery packs

xutong

qwqwqw2088 posted on 2023-9-9 08:34 The circuit board is long enough

After all, a toothbrush is also long, right?

xutong

sanhuasr posted on 2023-9-9 08:52 I recently replaced the battery 902035 for the cervical vertebrae instrument, and took a look at various lithium-ion battery packs

Such a small battery

秦天qintian0303

The circuit board is a good structural component

xutong

Qintianqintian0303 published on 2023-9-9 14:34 The circuit board is a very good structural component

A few days ago, I made a thermocouple clip with PCB

sanhuasr

xutong posted on 2023-9-9 09:51 Such a small battery

Yours is 700mah, which is about the same as mine.

killer789

Does this kind of circuit with a small capacity battery need to be protected by surge protection at the input of the power supply? By the way, I would like to ask you guys which introductory books should I read that explain the circuit design of the battery.

xutong

killer789 posted on 2023-9-10 12:13 Does the small-capacity battery of this circuit need to be designed with surge protection or other protection at the input end of the power supply? By the way, I would like to ask the big guys, what should I look at...

Where does the surge come from?

Basic books are enough, think more about why

lkh747566933

Did you change the battery because it was worn out after a long time of use? How long have you used it?

xutong

lkh747566933 posted on 2023-9-11 13:43 Did you change the battery because it has been used for a long time and it is no longer working? How long have you used it?

After using it for 1 year, the internal resistance of the battery has increased significantly, and it is not powerful enough to brush teeth.

lkh747566933

xutong posted on 2023-9-11 16:53 After using it for 1 year, the internal resistance of the battery has increased significantly, and it is not powerful enough to brush teeth

It's been one year, I feel a bit bad! I have to stick with it for three to five years.

xutong

lkh747566933 posted on 2023-9-12 18:40 It's been like this for 1 year, it feels a bit bad! I have to stick to it for 3 to 5 years.

Can't hold on

lugl4313820

I replaced the battery with a Philips one, but the seal was not good and the battery was damaged, so it ended up being scrapped.

xutong

lugl4313820 posted on 2023-9-14 11:37 I changed the battery to Philips, but the seal was not good and the battery was damaged, so it was scrapped later.

Fortunately, the sealing of Xiaomi is still good.

yixiqiuyu

Does this belong to BMS? It seems that I don't have much chance to learn BMS. It's a bit difficult.

xutong

yixiqiuyu posted on 2023-9-27 15:20 Does this belong to BMS? It seems like I can learn BMS, but unfortunately there is no chance, it is a bit difficult

Does not belong