20 Most Recent Philips Philishave HQ7850 Electric Shaver Questions & Answers

The batteries need replaced. You will find the correct batteries at shaveroutlet.com at the link below


To open the shaver you will need to remove the back cover by removing the two screws. You may need to slide the trimmer up to reveal second screw. Inside, you will need to remove the metal clip that is in the way.

Use the tutorial video at the link below for information on changing the batteries


Philips... | Answered on Oct 13, 2013

You will find a replacement cord for model HQ7850 at shaveroutlet.com. See link below


Philips... | Answered on Apr 10, 2011

You will find a charger cord at shaveroutlet.com. See link below


Philips... | Answered on Jul 04, 2010

Philips suggests that the heads be changed every 12 months. If they are 12 months olor older and no longer cut well, they probably need replacing. You will fin replacements at shaveroutlet.com. See link below


Philips... | Answered on Jun 23, 2010

I have the same problem with the switch after many years of usage and no replacements on anything.
I took it apart and put the clear plastic plunger back in the rubber push button but it doesn't seem to contact anything when I press it.
I don't think I lost a part, but somethin seems to be missing???
Any ideas?
Leo at [email protected]

Philips... | Answered on Jun 13, 2010

Hopefully you discovered it's not difficult to take the shaver apart--at least if it's like mine.

Two screws on the back hold it together--one visible, one under the flip trimmer. They have odd slots but can be undone with a small slot screwdriver, though I think the proper way is with a torxx.

Once you undo the screws, take off the metal clips that hold in the batteries and serve as the screw holes. The batteries can be flipped up carefully (so as not to break the copper wires to the motor).

If your problem is like mine, you'll see a clear plastic piece that has dislodged from under the rubber push switch. Place the round end so that it lays in the rubber dome and contacts the switch.

You can flip the batteries back down in their proper position at this point and test to see if the plastic part is seated properly.

Then simply put the metal clips back and replace the screws. Amazingly simple. Hope that helps.

Philips... | Answered on Aug 18, 2009


Philips Health &... | Answered on Dec 07, 2020


Here is a guide how to replace the faulty battery pack yourself. It's a known problem that the batteries are dead if you don't charge the Lumea for more than 3 months.

Replacing battery in Philips Lumea LazyAdmin

Philips Health &... | Answered on Dec 01, 2019

Change battery in a t364 trimmer

Philips Health &... | Answered on Oct 29, 2019

You cannot service these units since they are prescription only and the settings on it are customized for you. You can contact the manufacturer or supplier to see what they recommend.

Philips Health &... | Answered on Oct 26, 2018

If the steel rod is loose going into the handle. It is time for a new tooth brush. If the metal rod is loose going into the brush head. Replacing the brush head should fix the problem.

Philips Health &... | Answered on Sep 30, 2018

Its haunted. you need a priest to bless it with holy water.

Or the button is stuck with toothpaste. Mine did that and the battery ended up failing a few weeks later. New ones are lot cheaper than when I bought my first sonicare.

Philips Health &... | Answered on May 11, 2018

Most likely, the noise is cause by a damaged blade or comb. The best thing to do is to replace them. You will find the correct replacements for model AT890 at shaveroutlet.com
Norelco Philips HQ8 Spectra Sensotec Precision Replacement Heads

Philips Health &... | Answered on Apr 02, 2018

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