Einleitung
This guide will teach someone how to take out the battery in the Polar M400 and replace it with a working one. A damaged battery could be due to lack of charge or submersion in water more than 30 meters. It could also be due to battery age and various malfunctions. Over time, excessive and wear can lead to battery damage. The Polar M400 has an internal, rechargeable battery. You can charge the battery over 300 times or two years before a notable decrease in its capacity. The number of charge cycles also varies depending on use and operating conditions. Once the battery is replaced, follow local waste disposal regulations and do not dispose of this product as unsorted municipal waste.
Was du brauchst
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Insert a standard paper clip into the holes on both sides of the watch that connect the watch's face with the wrist strap.
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Apply an upward pressure to the holes until the locking pins release.
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Use precision tweezers to remove the pins that connect the face with the strap.
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Use the T5 head on the iFixit screwdriver to unscrew the four screws on the back of the watch’s face.
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Use tweezers to gently pry the golden sensor away from the battery.
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Remove battery using the plastic opening tools.
Thanks, very clear straight forward steps
this shows how to take the battery out; what about replacing it nd securign the ‘electricity leads’ of the new battery to the watch?
même remaque que jonathan
pas assez de précision sur la remise en place des connecteur de la nouvelle batterie
Bonjour François, as tu réussi à remonter la batterie?
It says 'To reassemble your device, follow these instructions in reverse order' How difficult is that? So, put battery in, carefully fold contacts back, etc, etc....if that is not obvious, then please do not attempt this at all.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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Hello, thanks for the details !
The most tricky part: find the right spare part. I can’t find a replacement battery that could fit the original dimensions with reasonnable capacity.
Do you have any lead?
In case if anyone is still looking for the spare part I have just replaced my M400 battery with this one: https://www.aliexpress.com/item/10050045...
Replacement instructions were detailed enough to get my watch to work again.
Roman -
Once the battery is changed, the M400 does not work. Do you have to press any combination of keys?
You have to connect charging cable.
I have made the process with the same battery and once finished it does not work anymore, is there any combination of keys to start it?
I recommend not doing it until you know it
After the procedure, just plug the USB to your computer with Polar Flow running and it will restart your watch!
I read somewhere it won't start unless you plug the charger. Hope this helps.
I bought a connector USB there… Maybe can be interesting for someone else…
I had same problem =
“I have made the process with the same battery and once finished it does not work anymore, is there any combination of keys to start it?
I recommend not doing it until you know it
lojobis - 23-02-2019”
After the procedure, just plug the USB to your computer with Polar Flow running and it will restart your watch!!!
Could the issue be no electrical contact with the battery when reassembling? The contacts don’t seem easy
Polar won’t sell spare parts so where can I buy a replacement screen or a replacement front case for the M430?
After the procedure, just plug the USB to your computer with Polar Flow running and it will restart your watch…
Where could i buy the micro usb connection for the M400?
The Polar M400 original battery is an EVE 3.7V 190mAh lipo battery cell (352826) with dimensions: 3.5mm (thickness) x 28mm (height) x 26mm (width). Unfortunately this battery is discontinued and is very difficult to get. However, you can use this instead:
It has 30mAH less but the dimensions fit (3.5mm x 25mm x 25mm) . Since it comes with leads, the only thing you would have to do to adapt it is either expose the connectors, or connect these leads with the PCB connectors.
Oppure questa 190mAh 3.8V
https://it.aliexpress.com/item/400061109... 9359-4111-b6ad-6391504d1b12 & ws_ab_test = searchweb0_0, searchweb201602_1, searchweb201603_55
Ciao, vedo che sei italiano. Sei riuscito a rimpiazzare la batteria da te indicata senza problemi? Mi consigli di provarla?
Bonjour Merci pour les tutos
J’ai une polar M 400 et j’ai changé le connecteur USB .Je voudrais savoir comment on referme la connection sur la nappe du connecteur ?
Cordialement AM
Hi. I had changed the original baterry for this
https://nl.aliexpress.com/item/400061109...
190 Mah 3.8V Batterij Core Voor Polar M430 M400 Gps Sport Horloge Nieuwe Li-Polymeer Oplaadbare Accumulator Vervanging + Spoor Code
but my flash light in my Polar watch doesen’t worked give no lights more.
I made somthing wrong maybe? Can sombody help me?
Thanks
I have made the process with the same battery and once finished it does not work anymore. also connecting to polar flow does not makes any difference
Battery measurement give me 4V
Depending on the model of your Polar device you can either change the battery yourself or you need to have it changed by a Polar-authorized service center that only uses Polar-approved components. With every battery change, Polar performs a full periodic and water resistance check.
It may be easier to push the pins out in one direction. Unfortunately, I do not recall which direction was easier…
Nathan Gelderloos - Antwort