Mine has just stopped taking charge.

Oh, the on button is broken as well...

EDIT:

It's the Theragun Elite (https://www.therabody.com/uk/en-gb/elite...) from a few years back - there is no swappable battery. Will post pictures tomorrow.

EDIT 31/12/2024

Still not completely given up and still massively encouraged and grateful for commenters so far - thank you.

Found this page that shows the battery in question but I can't read the langauge so no idea...I can't find a replacement battery, sadly.

10.8V锂电池组，6V电源适配器，数显光纤放大器 - 〓器材友情交换〓 - 矿石收音机论坛 - Powered by Discuz!

Theragun Elite (white) pictures to support recent teardown efforts.

Still not found a battery source.

⟐ Answered July 16, 2026 at 12:49 MST

I own a Theragun Pro, and unfortunately the batteries no longer charge. The charger is working properly, so the problem is the internal batteries in the battery compartment.

Can anyone give me advice on how to open the battery compartment to replace the internal batteries without causing any damage?

I'd be sad to no longer be able to use the massager, since it still works perfectly.

Thanks to anyone who can help.

⟐ Commented July 15, 2026 at 18:35 MST

I would like to ask how to change the battery on Philips hair clipper DIY QC5580

Please help

⟐ Commented July 14, 2026 at 23:39 MST

⟐ Answered June 25, 2026 at 10:33 MST

⟐ Answered June 11, 2026 at 23:34 MST

During my research I found a number of complaints about the on/off switch failing and the ability of the groomer to accept a charge.

Initially the unit I bought worked well and had no problem with either the switch or charging. However, after owning it for about a year with light use, both of these problems emerged and now I can only turn it off by inserting the plug in the recharging jack.

In order to repair/troubleshoot the problems I need to know how to disassemble the razor/groomer.

⟐ Commented June 11, 2026 at 18:20 MST

This is an expensive water flosser, so buying a new one isn't attractive. It's out of warranty. Can anyone give me a hint or a link for disassembly of this device?

⟐ Commented May 31, 2026 at 15:29 MST

⟐ Commented May 28, 2026 at 10:46 MST

⟐ Answered May 27, 2026 at 5:28 MST

How can I connect them

I'm hoping someone here might be able to help. I have an old Braun CoolTec electric razor I believe it's the CT2s model that's about 10 years old, and I'm looking to replace the battery because it got to the point that it only charges enough to give me 3 or 4 minutes tops of shaving time.

I've examined the device pretty thoroughly but can't seem to find any visible screws. The only access point I found is at the bottom where there is a little slot for a flat screwdriver to be inserted but when I insert one and try to use some force in any direction nothing really moves and it feels like the plastic around is going to brake. Has anyone ever opened one of these up and successfully swapped out the battery?

Any advice or pointers would be greatly appreciated. Thanks in advance!

⟐ Commented May 24, 2026 at 7:30 MST

مكينه شغاله بس ماتكلف وفيها جلده خرجه من مكانها

Translation Arabic → English

The machine is working, but the rubber or seal is loose.The machine is working, but it's not expensive, and the seal is loose.

⟐ Edited May 20, 2026 at 7:05 MST

⟐ Commented May 11, 2026 at 7:25 MST

I let the toothbrush off for few minutes and after that, it starts working again at full speed like fully charged battery until few minutes of using it that the metal end gradually gets vibrate weaker and eventually stopped working again. Note that I didn't put it in the charger. I let it cool down for a while and the cycle repeats. Hopefully someone can help me. Thank you.

⟐ Answer edited May 09, 2026 at 16:26 MST

Does anyone have suggestions for an alternative method of charging these batteries? Based on the teardown, there are 4 18650 cells connected in series. The battery pack has 4 terminals B+, B-, NTC+ and NTC-. After a short search, the NTC contacts are for a thermistor to monitor temperature during charging and discharging. The cell says that it rated for 14.4V DC and the charger states that it outputs 16.4V from a 20V DC brick that is plugged into it with a barrel connector.

Does anyone know of a charger that is well suited for this kind of battery pack? Amazon does not have anything particularly promising.

Im hoping to design 3D print a new dock if I can find an appropriate charger. I would be happy to share my work with the community here too. There are lots of people with these issues.

⟐ Edited April 26, 2026 at 12:13 MST

As far as I can tell the only difference is the NiMH has a much higher capacity (2300 mAh compared to like 750 for the old one). Is there any reason to think a NiMH wouldn't work?

⟐ Answer accepted April 22, 2026 at 11:49 MST