Just did my one! This has bugged me for ages, so good to keep using a perfectly good toothbrush! Down with planned obsolescence!

Thanks so much for this very helpful procedure. I have just replaced the original 700mAh NiMh battery with at 2200mAh NiMh. I found the new battery on e-bay and it had the solder tags pre-fitted, although they needed a little trimming prior to installation. The whole job took me around an hour, I could probably have done it quicker but as this was the first time I had attempted it I exercised a little caution along the way, and also cleaned the brush before re-assembly. Well done Simon!

Many thanks Simon! Recovered 3 of these Braun and they used to open at the base. Fitted an NiMH after opening at the top as per your video, and it didn't run. Few mins on the charger, back and working. Another gadget saved from landfill. Cheers!

Thank you very much Simon, very useful! I had the same problem with not turning back on but when I had done nothing more than remove the insides from the casing, no desoldering, nothing. Happily, putting it on the charger for a minute worked. This device obviously doesn't like any tampering! I thought I must have cracked the PCB at first. Mine wasn't a battery issue but the underside of the rubber on/off switch cover was worn away, making it hard to turn on when assembled. A bit of silicone sealer has filled the gap and will hopefully work when it's cured. I do love fixing stuff.

I recently replaced the battery of my toothbrush with the help of this video. I used to get 2-3 days of juice out of it. After replacement I've been using it for more than two weeks now without recharging! Thanks a lot!!

What I cannot understand is why they don’t make them so you can just replace the battery like you can with a light. Great video buddy 👍🙂

I bought a Pro 2 unit pack years ago, only used 1 handpiece until it seemed to be down on power and charge duration. Put that aside for about 5 years until the 2nd handpiece slowed similarly. Was looking for exactly this type of information. Charged the original up and it's still working well another 3 years later. Original battery.

I've got two of these! One works long enough to charge the other...I'm off to try this. Thanks!

Just did this to a couple oral-b’s that had old ni-MH batteries. video was great, thanks!! I did not have de soldering bulb so I attached a straw to a vacuum which sucked solder right up! Also vaseline/petroleum jelly works well as a flux replacement!! 😎

Good job Simon and thanks for the video upload. I have the same brush and before watching this video I was trying, unsuccessfully, to open it from the bottom.

Many thanks for such a clear video. I've been wanting to replace the battery in mine for ages, but didn't want to break it taking it apart. Gone from the 700mAh cell that never worked well , even from new, to a new 2800mAh battery that lasts for ages!

Very helpful and great video to demonstrate the steps. Bear in mind that don't try to solder the terminal on the battery, as explosion may happen due to overheat the battery seal(s). Simon used correct method/tool (spot welding) to do the great job. Thanks Simon.

I followed your video to replace the battery. I was able to get the same battery at a local Jaycar store. The toothbrush is working and charging fine again. When I was unsoldering the negative battery terminal from the circuit board, I lifted the pad off the board at one edge. I was using too small sized soldering iron tip and applying too long on the board because the solder would not melt. When I changed to a thicker tip it melted quickly with no further damage, Thanks for your video.

Thanks for your tutorial. I could revive the brush. That is the sort of sustainability I really like.

Thank you for sharing. An informative video to replace a battery. Video gives me the confidence to replace a battery. The difficult part is to get the cell and motherboard out of the casing.

Brilliant Thank You !! Just unscrew it and found the fault ! The rubber that you push down onto the on button had a split in it ! Inside full of sticky toothpast ! WD cleanup bit 0f grease on the gear in the head !AND Ive got my lovely leky toothbrush back running again ! Thank you again from a very white smile !!🙂

Nice video. Just changed a battery on my toothbrush and I'm so excited that in The end guided by The steps you showed IT works again. Thanks

Thank you so much for this video! I replaced the battery in my toothbrush! Feels so good that in this case I'm not a victim of planned obsolescence!

Excellent, i had mine now for nearly 10 Years and now it was time for a new battery! Grat tutorial.

Just done mine. Had two to re-battery but one did not have the access using the charger peg and the top broke off when twisting it. However, I have got the other working again using the charger route and now have a spare PCB/motor should it be needed in 10 years time! Thank you for the video, and for those who pointed out the charger trick

I'm on my second one. After 2--3 years the part that the brush head slides onto becomes worn so the head vibrates when it should be snug. This reduces the orbital action significantly. Time for a new brush. I noticed it on my first one when I removed the head every time. I thought not removing the head would prevent this problem but it doesn't. I have it wrapped with electrical tape now.

I just did this upgrade following your video. Thank you. :)

Very useful, good video warts n all. Thanks Simon Jowett

I swapped a type 3756 with an eneloop aa. The original battery was shorter, so I had to cut some plastic bits, but it fits. I soldered the AA battery with the old metal bits.

YEESSS Great video! Crucially including the trick to restart the chips by putting the toothbrush briefly on the charger. I had followed a different video previously, which missed this bit out, and assumed wrongly I had overheated or blown the board. Just done two units upgrading from 700mAh to 2600mAh so should get mega time now :-)

I have an identical toothbrush. Now I know what to do thanks to you. So yes. Thank you!!

I had the same problem, I used the tester, and it was OK. So I did what you did, I put the toothbrush under charge. Unfortunately I watched just half of your video, so I didn't know you had the same problem. When I finished watching your video; it gave me hope. By the time the video was over, I checked the toothbrush: it was working. My battery is much bigger, I used a 2700 mAh battery, so I had to cut all the plastic that holds the battery, and just leave the black part at the end. With a bigger battery is not necessary, it just stays in place. The charge should last much longer. The battery I bought came with the connectors, because without that solder you have, it's tricky soldering a connector to the battery, very tricky.

Doing this today. I replaced the battery before but that one's almost totally gone. 1/2 the time I turn it on it only has 1/2 second action. Other times it's good for 2 minutes and dies, right at the end. I'm replacing with an Eneloop this time, figure it will last way way longer than the NiMH replacement I had in there before. The original was a NiCad. I did something similar with my Oral-B Triumph toothbrush around a year ago, replaced that one's battery with an Eneloop, it's been going strong ever since. Not having a spot welder, I used a regular solder iron. The connection seemed less than reliable but so far so good. Yes, down with planned obsolescence! Thank you for this excellent video. FYI, all, another video showing similar fixing of one of these types of battery operated toothbrushes advised wiping the outside of the unit dry after each use, saying that the death of these is frequently due to water seeping inside. I towel off mine after rinsing these days. So, after writing the above I started the process of changing the battery for an Eneloop AA that had a decent charge on it. It succeeded but there were a couple problems I had to deal with. I removed the battery that was in there. It was a NiMH I'd bought off the internet and it said on the side that it was 2200mah capacity. Of course, that is very doubtful. I then tested its voltage and to my amazement it was quite high, over 1.37 volts. But the toothbrush only worked sometimes in the last 1/2 year or more and would rarely work at all after 2 minutes and lately it wouldn't turn on for more than 1/2 second. So, what could be wrong? I decided to put the Eneloop in there anyway. I tore the tabs off the battery that had been in there and soldered them on the Eneloop. The one on the negative end wouldn't stick, so I roughed up that end of the battery using a dremel. Then the tab stayed soldered on. I assembled the toothbrush but encountered a problem in that the shaft at the top came loose from the rest of the internal unit. I persisted and managed to get it back on, completed assembly. It did not turn on, as Simon experienced and I put it on the charger for a couple minutes and then it turned on. And boy did it go! It had far more power than I'd had from the other battery and after a 2 minute usage it kept going like it never wanted to stop. I have it on the charger now, mission accomplished. I have no idea why it wasn't working with the previous battery. Maybe that was defective even though the voltage looks good using a multimeter.

thank you, just got one, it is hard to get open for me, but thanks to you I got it . Much appreciated!

Good man. Great to see videos like this. I try to fix everything I can, but don’t always know how. The hardest part can sometimes be diagnosing a faulty part or component

Dobry DIY, zrobiłem identycznie i działa !! Wielkie dzięki !

Thank you for your video. I followed the steps and upgraded mine smoothly. Since I thought removing and soldering of the metal strip could be difficult, I used 2 thin wires instead.

Thanks, just did this. The connector on the original battery was broken, thats why I ended up here. I didn't know how to open the case :-) Now the toothbrush has been repaired and upgraded. The original 700 mAh battery has been swapped with an Ikea 2000 mAh battery :-)

Thank you! Very different from other KZfaqr. I will try your process

I'd been wanting to replace the battery on mine but didn't know how to open it, I've replaced mine now and had the same problem you did but works great now. Thanks for a great vid.

"Toothbrush manufacturers hate him" find out how this man got 5 more years out of his toothbrush-

Great video. ive got a slightly earlier version of this toothbrush with a mechanical on/off switch and no timer. I bought it 11 years ago but its really been within the last 6 months ive had to charge it twice a week.. when it was new i charged it once every 3 weeks. I never knew the trick to get inside them, but now i'll have ti give it a go and change that battery

Well done Simon, thanks for the video, it worked for me. To think I was going to throw the whole thing away just because the battery died!

Just follow the instructions and successfully replace the battery for two OralB. Great video. One comment: you could you normal soldering head to solder a wire to the head of battery. There are some videos on KZfaq about how to do it. Good luck to all of you!

Thanks. It took me two failed attempts to get it right, but now I’ve got it. I’ve done two successfully so fR and another 5 to go.

Nice upgrade :) The onboard controller IC needs to be externally energized after the battery is removed. Once it's turned on, it then turns on the fet to power itself from the battery. This is partially for shipping purposes as the battery should actually not be energized during shipments. That's why they say "Charge device before using" ;) it really just turns the unit on fully. Thanks for the tip on the spot welder and being resistive welding. There's another user who was having issues with that and I passed on the info and see if they get better results now.

Planned obselecence averted! Thanks, just did mine now 😁

Helal Ossun bu kadar güzel anlatılır.Tesekkur ederiz

Thanks for this mate. This is on the agenda for tomorrow.

I like how you honestly fail just to find a proper solution. Great transparency! Thx 🙏

Just done mine by following your instructions- the old battery had a corroded positive post and the tag just snapped off but I found that a piece of 5mm de-soldering braid was perfect for the job….I had the same issue with it not working afterwards but a quick sit on the charger and hey presto off and running.Wonder if the battery will now outlast the motor? There must be many hundreds of these brushes in landfill all for the sake of a new battery..

Thanks for that, I had a 2009 battery which I just replaced with an enloop, I soldered everything, and came against the same problem: after battery replacement, the unit wouldnt switch on until I placed it on the charger, then removed it. After that everything functioned normally

Excellent video. Thank you.

Dude thanx I brought alive my 5 year old oral B!

Gotta hand it the guy for not editing out that WTF moment..... anyone who as ever worked on or in electronics has had many of them. So, Kudos to you sir! My purpose here today was to see how to get it apart, obviously. But, my plan was to use the case for my new 40mW laser module. Sadly, it requires a minimum of 3.7 volts. Oh well, plan B. PVC tubing. Good luck to all with your adventures.

thanks dude, it's so helpful video for all of us. greetings from Turkey :)

Thank you. I have changed the battery and it works perfectly

Awesome, thanks a lot for this tutorial!

Thanks mate, still an accurate solution, fixed our toothbrush.

You're the man! Thanks for sharing! 👍

Thank for your sharing. Great video!

Very simple and useful... From Portugal/Porto, THANK YOU

Thank you, just got mine working today again, the battery was completely gone after 10+ years. The soldering spots are pretty hard to get desoldered, I recommend adding some fresh solder on top first as it makes desoldering easier. About charging times: The charger's specification is 1.3 Watts. Assuming the old battery had around 1.3 Volts, this means it charges with 1 Ampere (1000 mA). If the new battery holds 2000 mAh then a complete charge would take approximately 2 hours. As we don't know whether the electronics stop the charging at any point, it is probably advisable to not charge much longer than that.

Good video. I'm having problems with mine exact the same 2006. I never thought it will last that long.

Thank you very much...broken connector on the battery "-",i was going to trow it away (didn't know how to open the case)

Thanks for the video! Ilike repairing stuff, not throwing away. Unfortunately this tutorial seems to be not working for the newer nodel (with timer) They are basicly the same, but those dheads from Braun changed the locking mechanism on the cap. Its now not L shaped latch, but click and done one. Once the ears are pressed down and latch, there is no way to retract them.

Aweseome ! Thanks a lot, I managed to open mine and I'll change the battery for an Eneloop pro. The pcb is red on mine.

Awesome job just got this brand as a free new member deal at my dentist. Brand new now but this is really fun to watch and maybe attempt to fix when the new battery gets "tired". Thanks and great job.

before watching this video i had the intention to attempt a battery change on mine but halfway through reconsidered.

Спасибо вам большое! Всё доходчиво идеально.

Great video. Helpful.

Thanks bro .hi from Turkey

Great job!

wasn't the battery in my daughter's pink toothbrush- still had 1.2V on it. switching it on even without the motor connected puts a dead short across it. saved the battery, & put the empty toothbrush into the heap of toddler souvenirs. might move the battery into my own, which only runs for two days' worth of use. cheers anyway!

I MUST TRY REBUILDING MY BATTERY TOOTHBRUSH!

Greate Job. Thx alot. I fixed my own one. In my case after fall down the negative battery bus wire was cut itself. I soldered it and all are work again. :DD thx.

Thank you for sharing.

Often with items nowadays the hard part is getting the case open without breaking everything.

Great help, Thank you.

I have replaced my battery and you have saved my 28 teeth 😬. Thanks my online dentist.😊

just what i needed to do. thanks for this

A lot of 18650 battery protection chips do exactly the same on low voltage in that they shut off completely. The battery then appears dead until it is boosted by the charging circuit again :)

Thank you very much... it save my time how to do...?

thanks Simon, good video

Thank you for the video. Which device are you using at 6:20?

Thanks for the video. There are some cells on e bay with the tags already welded on. But there are a few different sizes. Any info on the physical size of the cell you removed?

gracias ha sido de mucha ayuda

Awesome, mines on its way out, will do this soon, wish i hadn't of thrown my old one away now

I thought it had a smart charging system that only charges when needed so you can leave it on the charger ? Anyway, ours are on the charger for over 6 years now, but I wanted to take it apart to clean or solder a new switch as I have to press harder than normal to turn on/off. Thanks very much for the video!

Thank you very much!!

Nice video, what voltage of battery did you use?

straight push at the end, I made the same mistake. Good Video THX

Do you know what the base spring is used for?

Great video. Job done thanks to this. Many thanks. Best. J.

Good video . I will try it too .

Good job, but ... Charging time is not longer like in original battery? You exchanged it for a 3x bigger battery ?

Hi Simon, I just replaced the battery in my exactly the same oral b model with a 2500mah ni-mh battery following your video instructions. From 600mah to 2500mah is more than four fold jump. I wonder if it will also take 4 times amount of time to fully recharge the new battery? I think it is important to get the charge time right to maximise the lifespan of the new ni-mh battery. What did your experience with Sanyo 1900mah tell you? Thanks.

What did u use to stick the metal strip into the battery? And is there any optional that i can use?

Excellent vid , thank you, I was thinking of trying to convert one into a little dremel !, ps: you forgot to push the pcb through the second dowel !

You are a life saver

Interesting, mine that looks similar has a NiMH battery according to the recycling label.

Thnx. Usefull a video...

Amaziinggg!! just Wondering if my bRaun oral b's toothbrush was battery is drain & it brought me to watch this video. Hope I can do this. Thank you mate!

wish i had seen this a few weeks ago, i have just replaced mine with the same model. i thought they were be sealed with plastic welds. might have a go anyway with my old one. just as a thought, would the camera focus better if you had a plain background without all the squares?

I almost dumped mine.you saved my toothbrush.thanks!