Introduzione
This guide will show you how to disassemble the shaver, replace the batteries and reassemble.
The batteries are soldered directly to a PCB so you will need to be confident with a soldering iron.
Place your new batteries onto charge before you start so they have the same charge level when installed.
Cosa ti serve
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Soldering Iron
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T6 Torx bit
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Pliers
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Two new batteries. AAA size Ni-Mh with tabs. Originals were suppo 700mAh, I replaced with 900mAh.
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First remove the shaver head by pushing up on the cutting head. It will hinge up
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With the head rotated up you will be able to remove it by pushing it sideways. The isn't strictly necessary if it doesn't make sense.
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This will reveal two screws, mine were Torx T6. Remove these.
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Just push the two halves apart from the top end.
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Have a look at the picture to see where the clips are. Note the tab on the bottom end.
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The black module simply lifts clear of the housing.
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The clear lid has three clips on each side. Ease these up and lift the clear lid.
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The PCB lifts clear of the black housing. It is a little reluctant but there are no hidden fasteners. I found it best to slid a flat blade screwdriver down the side of a battery and lever out.
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Be careful not to apply pressure to the AC tabs, shown in the second picture on the right. They lift clear of the charger connection without assistance.
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De-solder the old batteries from the PCB using your preferred method.
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I cut the batteries free from the tabs. Then used a solder sucker to get rid of the bulk of the solder. Finally I heated up the joint and used pliers to push the remaining tab clear.
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Note the polarity marked on the PCB and install the replacement batteries. Make sure you cut the tabs down before folding them over to prevent any shorts.
Note that the existing batteries are spot welded to the nickel plate joining the batteries to the PCB. I cut and pulled apart the nickel plate, it was sort of mangled, from the battery rather than desolder where the plate joins the PCB.
It appears you have or purchased the replacement AAA batteries with the nickel plates included.
Mine didn't have the nickel plates that join the batteries to the PCB.
I added some solder to both sides of the batteries and then each nickel plate, for each battery, pressed the batteries in place so the cold solder touched and then reheated it so the solder on the batter and plate joined.
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Everything is just the reverse. There are no hidden tricks and you can see everything.
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There should be a seal under the clear lid, make sure it remains.
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Check the AC connectors are not bent and touching when the PCB is reinstalled in the black housing. If you get this wrong you may turn the shaver into a smoke generator.
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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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17 Commenti
Cool, helpful to me thanks!
Have a Braun HC3050 and had no idea how to open it ;)
Hi,
I follow all the steps but now both LEDs are blinking (shaver is still disasembled so it mught be orange when closed)
The shaver seems not to charge. :-(
I used higher mAh batteries: AAA 1,2V 1000mAh 1Ah
https://www.amazon.it/gp/product/B074YLK...
Are they maybe too much?
I’m not and expert in soldering and I don’t own a desoldering pump… But I think though I did everything right.
I hope I did not overheat something.. or damaged the motherboard..
What can I do?
Those batteries should be fine. Whilst I don’t know what the blinking LED means (it may be in the manual) I would check the following;
The batteries are around the correct way.
There isn’t any excessive solder creating a short circuit .
If you have a multimeter, check the voltage of the batteries with the unit unplugged. You may have got a dud battery. Ideally you should have charged them both before installing, this would have ensured they were both at the same charge level.
The metal tabs pictured at the top of step 6 aren’t bent etc.
Be careful with it apart, you may be familiar with electricity but please keep in mind there will be voltage exposed on the board which is capable of killing.
I’m not sure that helped much to be honest, feel free to post some close ups of your soldering and we can see if there is any issues with it. I doubt you have done any permanent damage.
Darryl -
Thank you very much Darryl!
You have some good points!
Especially the one about getting killed! I may have been not to cautious when I tryed to charge while still disasembled.. [sweating now]
I will be careful!!!
Battery polarity is same as before. Metal tabs are ok.
The manual does not mention that color.. Just red or green, steady or blinking.
I will check for shorts. That may be the problem.
Removing some exessive lead I may have scratches a pathway on the motherboard… shame on me! Rookie!
I’m really totaly new to soldering electronics… also sorry for wrong terminology!
Planned obsolency in products realy bothers me so I thought: “how hard can it be to change a battery?”
I now see it’s not that easy, but I gave it a shot!
Funny thing: My OralB toothbrush is also dying , and reading the fix… and I see it’s even more difficult!!
Anyway, I will let you know if I solved the problem!
Thanks a lot!
Very nice step by step guide. I am somewhat of a rookie with soldering , but still did in around 2 hrs. Hardest part is getting the old battery tabs out. A small vice or similar to hold the board is a must. Thanks for this very helpful site.. Ben-July 19
Hi, Ben.
Just curious : what do you mean by “getting the old battery tabs OUT?”
Are the tabs not p part of the board? Why would you remove them? If they ARE removed, how do you connect the NEW batteries?
Thanks for this awesome guide! Disassembled without breaking anything. It was little harder to find batteries with tabs, but they are already being shipped to my door :) I am looking forward to breathing new life to this otherwise awesome trimmer. Lately it wasn’t even able to complete my heavy stubble trim, what takes around 5 minutes.
For anyone following this guide, please avoid Eneloop AAAs.
I was initially happy and added a comment on 11/7/2019. Batteries didn’t perform very well, but I though they have to “break-in” by couple of (dis)charges. Now the battery time is similar. After about 3 minutes, motor rpm falls drastically and about at 10 minutes mark the trimmer stops completely.
I do not know, whether something else is faulty, but I suspect the batteries.
Hi, I followed your tutorial and chose the following batteries:
https://www.amazon.fr/Bonai-Rechargeable...
My problem is that my razor won't charge and the indicator light always flashes green on the power.
Can you please help me
Thx for your answers.
I have same problem. Battery is ok, multimeter shows voltage 1.2 after connecting. Did you solve you problem? I didn’t know, may be I’ve broke printed circuit board during disassembling..
Hi there,
I replaced the battery with new varta 800mAh.
Cruzer working, all indicator led fine, just 1 problem, cannot last long duration.
Just 15 minutes it is already out of juice.
Tried to run it without the cutting blade, the motor running very powerful but slowed down once loaded with the cutting blade.
Any suggestion?
Hi,
It's possible the battery you used doesn't have the capacity it claims to have. Also the blades could need some oil or be blunt making the motor work hard and the battery last less time.
Darryl -
Thanks so much for this. Worked like a dream and saved me from trashing a perfectly good shaver. The don’t make this model with the detail shaver anymore.
I have a razor that would often flash red lights instead of turn on, even when charged for a long time. I opened it up. The old batteries still had good voltage, so I thought that replacing them wouldn’t help, but I tried it anyway. And it worked! After briefly connecting it to the charger again, the razor has come back to life with much more vigor than with the old batteries.
Hey,
Thanks for the guide. It worked good. But before the repair my fully charged device lasted for about 1 min until the battery led turned red.
Now after the repair it is nearly unchanged. Still about one min and the led turns red and the power leaves. After connecting to the charging cable the device gets more power. I used the following batteries:
https://www.pollin.de/p/nimh-akku-aa-goo...
Did I maybe buy defect batteries or can there be something else defect?
Thanks.
If you don't have (or don't want to buy) a solder sucker, try a solder “wick” instead. You can even make your own :https://www.youtube.com/redirect?q=http%...
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