Question about Norelco T770 Beard Trimmer

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I have a Norelco Accuvac T770 trimmer that will not hold a charge

Since there is no other option than to use the rechargable battery I cannot use the trimmer. This trimmer has not had much use and is only a couple years old. Is there a repair service that can fix it without cost to me?

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  • yoyoma1 Feb 12, 2009

    Great report. I have the same problem; maybe I can do a similar solution. Thanks.

  • Anonymous Feb 26, 2009

    i has the same problem shaver little by little stopped staying charged. thanks for the info i disassembled my shaver already now im going to radio shack for the rechargable batterys

    thank again im sure it going to work

  • Sean Pipkin May 07, 2012

    I had the same problem, I ordered a new battery from shaver outlet.com for $8.99 price included shipping. The battery came soldered together with tabs, so all I had to do was solder the battery post tabs to the circuit board. Easy fix for little money!

  • dick cory Jul 13, 2012

    GREAT! But how do you OPEN the t770 shaver??

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I did everything possible to find help as I did not accept the answer from Norelco. They told me that there is no way to change the battery except by a qualified repair shop. I made them admit that they basically made a consumable device so they can get you to buy new shavers in the future - in so many words.

I finally pried the thing open as carefully as I could. Once opened, you will find 2 batteries glued together. They are Ni-Cd 2,4 volt - 600 mAh batteries. Looking all over, the only store that helped me was Battery Plus. There are stores all over the country storeloc
.aspx">http://www.batteriesplus.com/t-storeloc.aspx .

They sold me two 1.2v 1000mAh batteries for $3.50 each. For another $5 they spot welded them together with tabs for soldering the 2 wires on.

Okay, after getting the new batteries, I went back to my old batteries and slowly pried the tabs of the top. They pretty much snap off as they are only slightly tap welded on.

I then took out my model soldering gun and with a little patience, soldered the two wires on to the new leads on the new batteries.

Within minutes, I had the thing put back together and charging. It works great and now I can tell all of those who said it can't be done - or those who wanted $40 to refurbish it, to go scratch - I GOT MY SHAVER BACK!!!!

We all need to learn to stop living in a consumable world. I have a feeling due to the economy we are facing, we will all try to save money in this manner.

Good Luck!!!

Posted on Dec 30, 2008

  • dick cory Jul 13, 2012

    GREAT! But how do you OPEN the t770 shaver?? ANYONE!!

  • Howard Mosoff
    Howard Mosoff Apr 22, 2014

    Sorry took so long to see that I had a response and a question. FORCE! That's what you need unfortunately to open this thing up. But be careful as you can break it. You need to push down where the joints meet and use a little screw driver to pry it open. Anyway, update. After I lost the battery life again, I looked around and swa a new Norelco vacuum model. I broke down and bought it and it is even better then the original. You can use the newer one with just electric if the battery dies. It's their best model yet. Thank you Norelco. You saved face with me.

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A cordless phone battery works perfectly as a replacement on the T770. I used a battery for a Sony BT-T50, Ultralast # UL950. Just need to cut off the plug and solder the wires to the main board.

Posted on Mar 28, 2009

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I followed the advise of hmosoff, only I took the battery and the PC board to Batteriesplus. They had the batteries and did all the work for the cost of the batteries. My trimmer lives again!

Posted on Jul 03, 2009

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I basically followed hmosoff's solution once I got the trimmer open. I ordered a 2.4V 800mAh NiCd battery pack w solder tabs (should look like the trimmer's installed batteries) from an online battery dealer (Interstate Batteries) for $10.48 w S/H. I cut the wires from the trimmer's main board where they attached to the old battery pack's tab. I stripped a little insulation from the ends of the wires and soldered them to the replacement battery pack's tabs. After reassembling the trimmer, it's like new, and I look forward to using it for many more years.

Posted on Sep 20, 2010

  • dick cory Jul 13, 2012

    GREAT! But how do you OPEN the t770 shaver?? ANYONE!!

  • Chris Rompot Jul 13, 2012

    To open its case, I very gently and gradually pried the halves apart with small flat headed screwdrivers starting at the end where the recharger plugs in. In doing so, I broke one of the plastic tabs that hold case together. However, I managed to get it completely apart without snapping any of the other three (if I remember the number correctly). This year I replaced the batteries a second time and managed to gently pry the case apart again using small screwdrivers without any trouble or more broken tabs. The ease of re-opening the case might have been due to the tab broken off the first time.

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I just spent 10 minutes replacing the batteries with regular AA (not the best environmental solution but feels a heck of a lot better than buying a whole new shaver). With a little tape you can do it, too.

Posted on Feb 15, 2009

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Disassembled the beard trimmer, and took the board with batteries to BatteriesPlus...they replaced the batteries and did all the soldering work for $15.99, plus tax...less than half the cost of a new trimmer.

Posted on Feb 16, 2012

  • dick cory Jul 13, 2012

    GREAT! But how do you OPEN the t770 shaver??

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I thought my batteries wouldn't charge so I followed hmosoff's instructions but it turned out to be the switch. Regardless, I bypassed the batteries and the switch with wires to where the charger hooks up and used an adjustable adapter that I have for my camera using the 3 volt setting. Since I don't have a switch, I turn it on and off by plugging in or unplugging the cord at the base of the trimmer. It works great! never had this kind of power using batteries!.

I used a meter to compare the voltage on the batteries that came with the shaver and rechargable batteries from my camera and they are the same so I think almost any AA rechargable batteries would work.

Posted on Aug 18, 2009

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