⟐ Answered февраля 26, 2024 at 3:51 GMT-7

The issue: The unit is controlled via a wired remote which houses the battery. To my surprise, the firmware completely disables the mask if the remote is plugged into a USB-C power source. You cannot use the mask while it is charging.

This feels like a massive design oversight (or intentional limitation). Not only does it prevent you from using it if you forgot to charge it, but it also means that once the internal lithium-ion battery inevitably degrades in a few years, the entire £300 device becomes e-waste. Shark’s own documentation states the battery is not replaceable and the warranty is only 2 years.

Technical details found so far:

• Model: FW312UK
• Battery Specs: 9.62Wh / 2200mAh Lithium-Ion (housed in the remote).
• Charging: USB-C (3-hour full charge).

Has anyone successfully opened the remote yet? I’m curious if the shell is clipped or glued, and if the battery uses a standard JST connector or if it's soldered directly to the PCB.

Beyond battery replacement, has anyone looked into a way to bypass the "no-use-while-charging" software lock? Being able to run this directly from a USB-C power bank would solve the longevity issue entirely.

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⟐ Commented августа 01, 2026 at 0:50 GMT-7

I need to know if a screw is needed or not to keep the housing of the bobbin of tread fixed to te machine.

⟐ Answered августа 01, 2026 at 0:01 GMT-7

⟐ Answered июля 31, 2026 at 18:37 GMT-7

⟐ Answered июля 31, 2026 at 17:57 GMT-7

⟐ Commented июля 31, 2026 at 6:53 GMT-7

⟐ Commented июля 30, 2026 at 19:37 GMT-7

⟐ Commented июля 29, 2026 at 23:25 GMT-7

⟐ Commented июля 29, 2026 at 12:17 GMT-7

⟐ Answered июля 29, 2026 at 9:13 GMT-7

My issue is that the globe does not spin freely, because the globe seems to be sitting lower than usual at the bottom.

How does one remove the spindle (metal rod running through the center) on one of these? If I could safely remove the spindle (without any further damage to it), then maybe I can insert a plastic bushing to make the globe spin freely again? When I raise the globe, (like with my finger there) it spins freely. So I think the globe sits too low and there must be something missing. Or it could be something else. Maybe something on the inside?

Or, if you have another suggestion and maybe have seen this issue before I would appreciate a fix here!

Thanks a lot in advance!

⟐ Answered июля 28, 2026 at 0:02 GMT-7

Luckily, I found another ifixit post, the only place on the internet it seems, where someone understood why specific notes wouldn’t be working. Here is the link: ++"E" key and 3rd black key is not working.

I understand very little about circuit boards, but I was able to identify the problem immediately. C, E and G# receive and give inputs along the same path. There is an issue with the soldering on one of the *things* at the first E key, where the problem starts. See the images for this issue.

So, one of my problems is that I don’t know anything about circuits or circuitry terminology, so I can’t even describe this issue, much less start to fix it.

Can anyone help me at least put a name to this, so I can start to go about fixing it? It seems like a basic circuitry issue that wouldn’t be hard to fix, but I don’t know where to start. Any help is appreciated.

⟐ Commented июля 26, 2026 at 16:42 GMT-7

⟐ Answer edited июля 25, 2026 at 18:16 GMT-7

⟐ Commented июля 25, 2026 at 12:03 GMT-7

⟐ Answered июля 25, 2026 at 10:09 GMT-7

⟐ Answer edited июля 25, 2026 at 5:57 GMT-7