Philips Norelco QT4085 beard trimmer disassembly and battery replacement
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- Опубликовано: 22 авг 2024
- This video distills what I learned (the hard way) about the proper order of operations for disassembling this [QT4085 ] model beard trimmer to get to the battery to replace it.
Thank you for showing me how to disassemble. I love this trimmer, and have tried several replacements, and they all suck compared to this one. But with new batteries, its ready for another 10 years!
Ditto.
Great. Thanks for the help guiding how to open it w/o destroying it. Removed and replaced the battery set and all is good again. Couldn't find another trimmer quite like this, reason why I decided to fix it.
I found this video a couple of years ago & just replaced mine with some cheap rechargeables from Poundland (my equivalent of your Dollar Store). Now I’m back because they’ve already failed.
Mine looks exactly the same but it’s got NiMH batteries & far less circuitry inside, no chip or anything, just a small transistor, 4 resistors, the LED & switch.
I toyed with the idea of converting it to lithium, but that would be doubling the voltage (which I guess I could get a buck converter to remedy) & I’d have to install a USB socket & charging circuit. A nice little project idea, but I just don’t have the time, so I’ve ordered a proper NiMH pack to go in.
These trimmers are so great, they weren’t cheap either. Somehow I don’t think Philips make stuff to this quality anymore.
Hey thanks. Getting it together was the real chore, but you helped me.
Just put mine back together. Only had two left over pieces, haha. A spring and a small chrome piece. Trimmer works as intended tho. I did put the second spring ad pin where the blue safety guard goes because I noticed it didn’t spring like before. I suspect the other goes to the height adjuster because there isn’t a clicking anymore. Not worth taking it apart.
Found the NiCad at Batteries +. They glued them together and added the connectors to match the originals. Cost me $9.00 total. Thank-you! I was about to toss it!
The Batteries+ price sounds very reasonable!
The original manual of a similar model (QT4045) actually does display a battery removal / replacement process (both in text and with images), but those unfortunately prove to be insufficient in practise. It only states you need to remove the plastic sidepieces first, then you can simple split and remove the upper of the inner plastic frame / housing parts by wedging it up. In practise, that doesn't work, as the upper side of the inner plastic frame / housing is held back by that ring and two snap-fits. However, I think you can skip the removal of the screws and motor housing. You can reach those snap-fits without doing so. Thanks for the video.
Good job and great video! I used it to fix a 4045 model that is basically the same. Thank you!
Thank god I found your video. Thank you for this presentation. It really helps improve my odds.
I put Eneloops in mine over 10 years ago and its still going strong. I use it till it goes dead, which takes a long time, before recharging.
Were those old Eneloop batteries NiCd chemistry? Because fully discharging before recharging is recommended for NiCd's....but NiMH batteries last longer if you charge them any time they start to get low.
@@summetj They are NiMh. That's what I have heard, but I have used Eneloops in cordless phones and they don't last very long being charged every time they are put back in their base.
@@kwd57 if it works keep doing it.
Bedankt voor het delen, heb mijn scheerapparaat hiermee weer als nieuw kunnen maken. Top
Graag gedaan. Jay
Thanks for this video. Very helpful! I don't have this exact model, but mine looks pretty much the same with a different model number. T780 looks the same, but a different power button and color. 🧔🏻👨🏻👶🏻
Thank you foe this video!!!! I've owned 2 of these actually 3 because there was a Tan / Grayish version before this one that was exactly like this model except it didnt have the vacuum feature which is kind of gimmicky anyway. My favorite comb/guide trimmer of all time... gets my beard and hairline shape exactly how I want it. I tried to disassemble my old one myself and basically destroyed it trying to get it apart. Bought a second used one about 3 years ago on eBay and KEPT it charging constantly until I forgot and it hasnt worked in almost a year. Haven't been able to trim my beard the way I want it ever since. Thank God for you putting this video up.
One question... im not an electronics guy but I can copy what I see on a RUclips video. Please explain exactly what voltage/current ect.. rating battery to get and how to wire them in parallel to each other... or whatever it was you said you might have to do. I do understand the difference between NiCad and NiMh though.
Tanks ❤❤
Hello, thank you very much for your great and helpful video. Only one question can you please share how can I find batteries before I open my trimmer. Can you please write me the model/dates of the batteries. Thank you in advance😊
I purchased AA rechargeable batteries with "solder tabs". Something like this: amzn.to/3AlpeAn
@@summetj Great, thanks! All the best
When I took the razor apart, the black slider piece fell off along with 2 stainless steel pins and 2 springs. There are two holes about two thirds of the way down the grove that the slider moves in. I'm guessing that the pins go in those holes but I'm not sure if I need to put the pointy end of the pins in the hole or the flat end. I'm also not sure what to do with the springs. How did you put the pins and springs back on the razor? Thanks in advance!
IIRC, the springs go in first and the flat ends of the metal pins is against the spring, while the pointy end mates up with the divots/holes on the black plastic slider (one pin/hole at a time).
I just got my Norelco vacuum razor rebuilt with the same Kastor NiMH battery that you used and it charged perfectly and seems to be working well. Thank you for your very informative video!
@@summetj, when I took the first side off the razor, these two pins fell out. They are small tubes with pointed ends, and the spring goes into the tube. I have spent 20 minutes looking for the holes to put them back into, and cannot see anything that they fit into. Thoughts? Thanks in advance.
@@davidh1216 the springs and pins go into holes which I believe are in the back of the razor. There is a sliding plastic piece with 2 indents in it that cover the holes when you assemble the Razer. The other side of this plastic piece has little square teeth that interface with the adjustment ring.
Hello and thanks for this video! I am about to replace a battery in the same razor with a 2900mAh MiHN one.
Can you talk a bit how good of an idea the replacement was in hindsight? Is the device still operative and being used? Would you do it again?
Well, I replaced the battery in 2019. It worked great until COVID hit (6 months?), at which point I shaved my beard to fit N95's to my face better, and stopped using it. I just went and grabbed it out of the drawer and it was dead, so I plugged it in to charge it. After 3 minutes of charging the motor ran strong for at least 20 seconds, so I think it's working fine still...but won't really know until I decide to grow out a beard again and start using it on a regular basis....
I need that fix.
Excellent video, do you know the volts / amps for the OE charging adapter?
2.4 volts, and what looks like 1500 mA (but it might be 150.0 mA....the print is very tiny)
Thank you good sir.
What was the original battery part number or specifications (size in mm length & width, voltage, 2.4 volts I assume)? I found a site on eBay that may be able to get the original batteries.
It was 2 AA sized cells, don't know if it had a part number or not marked on it.
@@summetj Thanks, but I really needed to know the length of the battery. I took my a part. The batteries are 49mm long and I did not have Ni-Cad installed. I had the Ni-ME installed. Thanks for your video.
3:20,,, IT'S TOO BAD YOU DIDN'T SHOW REMOVING THE BATTERIES🤔🤔
From what I remember, I just cut the wires close to the batteries and pulled them out. You have to solder the replacement batteries in, so make sure you cut the wire close to the battery to keep as much wire left over as possible so you won't have to splice. Mechanically, once you have the case apart the batteries don't pose any issue.
QT4085
Great, thank you for the model number!
Whole video os out of goddamn focus.