Remove previous ear cushion by rotating the clockwise and pulling it off. When reassembling, be sure to line up the locking plates.
  • Remove previous ear cushion by rotating the clockwise and pulling it off.

  • When reassembling, be sure to line up the locking plates.

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Remove the screws (9.47 mm Phillips head) from the blue plating on the headset to reveal the inside. Remove the screws (9.47 mm Phillips head) from the blue plating on the headset to reveal the inside.
  • Remove the screws (9.47 mm Phillips head) from the blue plating on the headset to reveal the inside.

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If you are working on the LEFT side ear, you will first have to detach the battery by gently unplugging the white plug on the top of the board. Make sure when unplugging the battery to not pull the manilla colored part which is attached to the board, but the white plug instead.
  • If you are working on the LEFT side ear, you will first have to detach the battery by gently unplugging the white plug on the top of the board.

  • Make sure when unplugging the battery to not pull the manilla colored part which is attached to the board, but the white plug instead.

  • If you are working on the RIGHT side ear, you will first have to remove the charging contacts (2 7.92 mm Phillips screws).

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Desolder the necessary wires. (Each side will be slightly different.) Be careful when using a soldering iron. Refer to the desoldering guide for tips. For the purpose of this guide we clipped the wires connected to the board.
  • Desolder the necessary wires. (Each side will be slightly different.)

  • Be careful when using a soldering iron. Refer to the desoldering guide for tips.

  • For the purpose of this guide we clipped the wires connected to the board.

  • Remove the 4 screws (7.71mm Phillips head) using the #0 screw bit, that are holding the board in place.

  • Finally, remove the audio board.

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Remove the battery by carefully prying it from the headset. Remove the battery by carefully prying it from the headset. Remove the battery by carefully prying it from the headset.
  • Remove the battery by carefully prying it from the headset.

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Conclusion

To reassemble your device, follow these instructions in reverse order.

2 other people completed this guide.

13 Comments

So there are two batteries in this headset that need to be replaced?

Doug Green - Reply

Also, what battery do I purchase and does anyone know a good source to purchase them?

Doug Green - Reply

Max battery size: 50x36x9mm

Origina battery: 40x30x8mm

The pcm board can be replacement by old battery module.

Dariusz Fukiet - Reply

Only one battery inside. Not sure why this guide takes appart the whole headset.

All steps&pictures related to right side (step 1, 2 and 4) are misleading and unnecessary when doing just battery replacement.

I ordered replacement on aliexpress.

joze_markic_bf - Reply

What part number please and thank you in advance

jon fystro -

Look at Hixon 3.7v Rechargeable Li-polymer battery for MP3. Specific size 40×30×8mm. That looks to be the correct battery.

Eric Phillips - Reply

Hello, I purchased this battery for the replacement on the 800x but it takes a bit of modification.

1200mAh Extended Battery for TomTom One IQ, V2, V3, V4, XL & XL-S GPS Devices (Not compatible with any of the TomTom One N14644 GPS Unit).by MPF Products®

Link:http://a.co/gmBaiVw

I have tested the headset at full volume and with 2 devices hooked up on bluetooth.

The battery last for about 10-11hrs in till it powers down…… I included a link down below to a drop box folder with pics to give a better idea of how I did the modification.

Link: https://www.dropbox.com/sh/m59lgx4jfd40v...

soakman707 - Reply

I found this battery, would it be ok to use? VINTRONS Rechargeable Battery 1200mAh For iPOD 4th Generatio, 616-0183 https://www.amazon.co.uk/dp/B00KG71XZI/r...

John -

that might be a bit to long… I had to cut out a little of the plastic toward the bottom to fit the battery that was was 45mm long, 34mm wide, 8mm thick.

soakman707 -

Ok thanks for getting back to me. Which of the dimension was to big, 45mm? Or 35? I’ve been having a good look around, had no idea it would be so difficult to source a battery lol. The post above dated 19/10/17 regarding dimensions, do you know if the original dimensions are accurate?

John - Reply

51mm is to long. The PCM board with 3 pins(if u have old battery) can be replacement to the new battery. So u don't need 3 cable in new battery. All batteries are the same, only PCM board can be different and pins size.

Cables in original battery:

Red +

Black -

Blue Thermistor

Dariusz Fukiet -

Thanks for the advice, I think I've found one that will be perfect.

John -

I'm modifying to external 18650 battery 3100 mah should last 36hrs

jon fystro - Reply

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