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Philips Norelco BeardTrimmer 3100 Battery Replacement

What you need

  1. Philips Norelco BeardTrimmer 3100 Battery Replacement, Front and Back Panels: step 1, image 1 of 1
    • Remove the comb from the top of the trimmer.

  2. Philips Norelco BeardTrimmer 3100 Battery Replacement: step 2, image 1 of 2 Philips Norelco BeardTrimmer 3100 Battery Replacement: step 2, image 2 of 2
    • Place your thumb underneath the blade and push upward to remove it.

    If you have the older 3100 model with the twist off blade, after twist off, check your blade housing and motor shaft bearing area when you remove your blade thinking you need battery replacement. Mine (also a 3100 but looking somewhat different likely older) was so jammed with 7 yrs of beard trimmings that it slowed the blade so I thought it was a weak battery!

    Took a full 10 min with a 100 psi air hose to tease it all out but now is like new!!

    Ron - Reply

  3. Philips Norelco BeardTrimmer 3100 Battery Replacement: step 3, image 1 of 2 Philips Norelco BeardTrimmer 3100 Battery Replacement: step 3, image 2 of 2
    • Hold trimmer towards you as shown in the diagram.

    • Insert your prying tool/metal spudger into the marked area.

  4. Philips Norelco BeardTrimmer 3100 Battery Replacement: step 4, image 1 of 3 Philips Norelco BeardTrimmer 3100 Battery Replacement: step 4, image 2 of 3 Philips Norelco BeardTrimmer 3100 Battery Replacement: step 4, image 3 of 3
    • Apply gentle pressure and begin prying open the back panel.

    • Separate the panel one notch at a time. Listen carefully as you're prying the panel apart and notice each individual notch release.

    Thank you for this part!

    Direct Heart lines - Reply

  5. Philips Norelco BeardTrimmer 3100 Battery Replacement: step 5, image 1 of 3 Philips Norelco BeardTrimmer 3100 Battery Replacement: step 5, image 2 of 3 Philips Norelco BeardTrimmer 3100 Battery Replacement: step 5, image 3 of 3
    • Pull the trimmer apart using your hands once the panel is at least halfway apart.

    • Pull the wires attached to the battery off of the power connectors before completely removing the back panel.

  6. Philips Norelco BeardTrimmer 3100 Battery Replacement: step 6, image 1 of 2 Philips Norelco BeardTrimmer 3100 Battery Replacement: step 6, image 2 of 2
    • Hold the trimmer towards you.

    • Place the metal spudger tool in the marked area.

    Removing this front panel isn’t necessary to replace the battery. This step is a waste of time.

    michaelwmudd - Reply

  7. Philips Norelco BeardTrimmer 3100 Battery Replacement: step 7, image 1 of 1
    • Apply gentle pressure and begin prying the front panel.

    • Separate the front panel one notch at a time.

  8. Philips Norelco BeardTrimmer 3100 Battery Replacement: step 8, image 1 of 2 Philips Norelco BeardTrimmer 3100 Battery Replacement: step 8, image 2 of 2
    • Pull the trimmer apart using your hands once the panel is at least halfway apart.

  9. Philips Norelco BeardTrimmer 3100 Battery Replacement, Battery: step 9, image 1 of 3 Philips Norelco BeardTrimmer 3100 Battery Replacement, Battery: step 9, image 2 of 3 Philips Norelco BeardTrimmer 3100 Battery Replacement, Battery: step 9, image 3 of 3
    • Face the battery towards you.

    • Locate the power connectors on the bottom of the trimmer, pull them from the base with your spudger.

  10. Philips Norelco BeardTrimmer 3100 Battery Replacement: step 10, image 1 of 1
    • Grab the battery by its sides, pull it upwards out of the base of the trimmer.

  11. Philips Norelco BeardTrimmer 3100 Battery Replacement: step 11, image 1 of 2 Philips Norelco BeardTrimmer 3100 Battery Replacement: step 11, image 2 of 2
    • Locate the connection between the blue wire and the battery. Melt the solder and completely remove the battery.

    • Be careful when dealing with solder. The metals will become very hot and can cause damage to skin/clothing.

    what power does this battery hold

    Shubham Sharma - Reply

    Would be nice to have some specs for the battery here so we can buy a replacement before we open it up.

    James Almeida - Reply

    Looks like a triple A NiMH battery, I'm going to try and replace it with a Sanyo Eneloop pre soldered battery tip.

    Maher Salti - Reply

    I have this trimmer and recently replaced the battery. It is a NiMH 750mAh AAA 1.2V.

    michaelwmudd - Reply

    This also works for BT405 hope this helps

    Mike - Reply

Conclusion

To reassemble your device, follow these instructions in reverse order.

29 other people completed this guide.

Darren Chu

Member since: 09/03/15

1,605 Reputation

3 Guides authored

Team

USF Tampa, Team 15-2, Blackwell Fall 2015 Member of USF Tampa, Team 15-2, Blackwell Fall 2015

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20 Comments

Hi, what are the specs on the NiMh battery?

Eric Nguyen - Reply

NiMh AA 1650 mAh 1.2V rechargeable battery. Search Amazon.com for philips norelco qt4022 battery. One result is UPC 737212062822

galligant -

I think you can simply use a AA battery, 1.2V

Olivier Lefaux - Reply

Note: AA Alkaline battery is 1.5V and not rechargeable.

galligant -

Awesome work.very helpful

Himanshu sahrma - Reply

can I use the electric adapter in place of battery?

Avijeet60 - Reply

Hey!! Whats the mah of battery??

ashish - Reply

HI Darren,

I’ve to say this is a cool work. You’ve done an extra-ordinary support for Philiphs Norelco users. As a beard style lover I’s thinking of buying a new Philips one instead of my old remington MB320C. I have already visited online websites like https://trendyseekers.com/best-beard-tri... to learn different model - Panasonic ER -GB 40s, Bruan BT 5070 and more. I have also seen philips norelco beard trimmer 3100. online. But I was curious about blade replacement and battery durability, charge capacity and of course battery replacement. My pleasure I found your post link on the fist page of google; simply hit on and discover your brilliant post. The 3 lines introduction has made a long expression to understand I do think. All the 11 steps you mentioned with nice images really amazing and useful for the users. I would love to say thanks for your awesome work and will be highly appreciated if you let me know how long does the charge remain after a single charging please.

Randy G

Randy Gardner - Reply

The battery I took out of my QT4000 is EXACTLY the size of a TRIPLE A (AAA) battery - a bit shorter than a AA and much smaller diameter.

jdenny - Reply

My battery is not charging(the indicator on charger doesnt glow).

I tried other chargers also.

What should I do?

if not repairable, can i charge the battery by removing it?

Sanku - Reply

Great tutorial. Saved me $75.

Removing the cover is a bit of a PITA.

Rather than ordering one from Amazon, I just used an existing Energizer AAA rechargable battery. It holds2300 mAh vs the 1650 mAh of a similar 1.2v battery on Amazon.

I tore off the metal tabs from the existing battery and soldered the tabs to ends of my AAA battery with solder and flux.

Curtis Patrick - Reply

it is NiMH AAA 0T750 1.2 Volt GS YUASA battery.

madniit_007 - Reply

Jst tell me which diaode and resistance use in it?

Sanket gawas - Reply

thanks so much for the info, i did exactly what you said and now my old QT4000 works like brand new. Fantastic. Such a good little unit and even better as its so easy to replace parts, rather than just get another something else. I did oil the moving parts in the blade area as well, which increased its overall cutting power. Many thanks, Cheers Michael

michael midnight - Reply

I have this model and it worked fine for 6 years. Then one day, it wouldn't turn on. I pushed the button, saw a brief vibration, and then nothing. I thought it was busted and was about to buy another when I checked this guide and removed the blade as in step 2. Turns out it was just clogged with 6 years of stray beard hairs 🤦🏼 Thanks for the guide, I didn't realize that I should be cleaning UNDER the blade every once in a while. Now I know!

Duder - Reply

Can you replace existing NiMH battery with a Li-Ion one? Or use a AAA Li-Ion?

Vivek Shah - Reply

Excellent tutorial I didn't buy a battery off amazon tho I used an ikea ni-mh AAA rechargeable battery instead works like a dream again thank you

Mike - Reply

My local Batteries Plus had an almost identical replacement for the original Ni-MH AAA. Here's the link for their battery: https://www.batteriesplus.com/productdet...

I even asked them if they could ask solder tabs and they gladly did so, free of charge!

Juan J. - Reply

Muito Obrigado

Carlos Sá - Reply

Ditto to the earlier comment to check your blade housing and motor shaft bearing area when you remove your blade thinking you need battery replacement. Mine (also a 3100 but looking somewhat different likely older) was so jammed with 7 yrs of beard trimmings that it slowed the blade so I thought it was a weak battery!

Took a full 10 min with a 100 psi air hose to tease it all out but now is like new!!

Ron - Reply

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