Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (2024)

Posted on 13 September 201819 January 2024 by Ionic Admin 17 Comments

We have been asked several times about options for charging your electric toothbrush from a 12V DC supply as available in cars, caravans, RV’s, boats, yachts, etc. for when you are travelling or living off-grid. You can read the various options in the article below.

The USB toothbrush charging option

One option is to use a USB powered toothbrush charger. You can then use an in-car USB adapter to convert 12V DC from the lighter socket to a 5V USB connection to power the toothbrush charger:

Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (1)

There are various 3rd-party USB powered chargers for both Philips Sonicare and Braun Oral-B toothbrushes available through the links below, though we have no experience in how reliable they are or how well they work:

Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (2)

Please note that as an eBay partner we may receive a small commission if you make a purchase. This does not change the price you pay.

The second option is to use an official charging travel case from either Braun (for Oral-B toothbrushes) or from Philips (for Sonicare models), as described below.

Braun Oral-B charging case

These charging cases are supplied with some of the Genius range of toothbrushes and allow your toothbrush to be charged while stored in the case. They are available in black, white or white/rose gold, with part numbers 81574166 (black), 81574167 (white) and 81621558 (white/rose gold). These are available through the links below the photo. Many Oral-B electric toothbrushes will fit into these cases as the Genius brushes are quite large (total length of toothbrush without brush-head is approx. 204mm).

Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (3)

The charging case uses a separate mains power supply, which has a rated output of 12v DC at 400mA (click to enlarge photo of power adapter):

After buying the case you can wire it up to your 12V supply for toothbrush charging. You will need to find a suitable connector, or cut the connector off the official charger, or solder wires internally/externally to the input socket. Below is a photo showing the polarity of the input plug. Click to enlarge the photo:

Please let us know in the comments section if you can measure the diameter of the connector pins. Perhaps a trimmed down female Tamiya type connector would fit? Or simply get the mains adapter at the same time as the charging case and chop the cable in half to use the plug and wire it into your vehicle. An in-line fuse of around 500mA would be a good idea too.

Philips Sonicare charging case

Sonicare charging travel cases are available in various colours. These are powered by USB.

Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (6)

See our separate Sonicare Charging Case page here.

The cases appear to have a standard USB-mini input socket so a standard ‘USB to USB mini’ cable should fit the case if it is not supplied with one.

Let us know in the comments section below how you get on, or if you have any other solutions for 12V toothbrush charging!

  1. Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (8)Lola

    26 June 2019

    It drives me crazy that Oral B doesn’t offer USB charging even in their premium Genius brushes. I want to be able to charge my brush via USB when I travel internationally. Why the hell would I need to charge my phone from the brush storage case? It’s 2019 and others have figured this out. Completely absurd. Get with the times Oral B!

    Reply

    1. Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (9)Ionic Admin

      27 June 2019

      Oral-B now make the Type 3755 charger that is also supplied with their Genius X toothbrush. This is powered by a low-voltage DC adaptor and will fit most other Oral-B toothbrushes.

      Reply

        1. Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (11)Ionic Admin

          11 July 2019

          Using the eBay links above you should be able to find a seller who delivers to Australia.

          Reply

  2. Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (12)jan

    16 September 2019

    The connector for the travel case is the same as for braun electrical razor kits it seems

    Reply

  3. Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (13)Mike

    3 December 2019

    I have the older style braun charger (the donut shaped charger). Do you know of anyone who has cut the transformer off and wired it to a USB plug? Any tips?
    Definitely do not want to brick my tooth brush but it would be great option and save me from having to buy a new tooth brush just so I can charge it from my camper van when on the road. Thanks!

    Reply

    1. Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (14)Ionic Admin

      3 December 2019

      Do you mean the Type 3731 charger? The voltage converter in the plug on these will be outputting low-voltage AC, so you can’t replace this with a USB-style DC power supply. Your only realistic option for running the 3731 charger off 12V DC is to use a 12V DC to 110V or 230V AC inverter and plug the 3731 charger into that.

      Reply

      1. I did this.on my new 3772 and the 1st two times bit got the green light and charged then third time no light no charge. Why?

        Reply

        1. Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (16)Ionic Admin

          10 February 2023

          Do you mean that you are plugging the Braun charger into the AC outlet of a DC-to-AC inverter?

          Reply

  4. Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (17)emilio

    29 January 2020

    You can find charging cables for Braun razors online, a USB connector on one side and an output Braun-shaped connector, on the other. Maybe this connector would fit. The voltage and amperage seem right.

    It makes sense for oral-b to use the same standards as braun razors – which also would mean they will not abandon it very soon.

    Reply

    1. Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (18)Ionic Admin

      30 January 2020

      Yes it would seem to make sense for Braun to use the same chargers for their shavers and toothbrushes. However, the toothbrushes need to be fully waterproof so they use inductive charging. The shavers use plug-in electrical connectors that are not waterproof.

      Reply

  5. Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (19)Ian

    16 November 2020

    I’ve bought one of those cheap eBay usb chargers, it works perfectly in my campervan. Problem solved.

    Reply

    1. Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (20)Rachel

      9 May 2022

      Hi Ian ,
      With the eBay usb charger, Does one still need to plug to power point. We need one that can be charged by our caravan battery. For free camping.

      Thanks

      Reply

      1. Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (21)Ionic Admin

        9 May 2022

        As long as the USB outlet in your caravan is active when not hooked up to on-site power then the charger will work.

        Reply

  6. Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (22)Thomas King

    17 March 2024

    The triangular braun shaver plug and oral-b plug are interchangable. I use the same charger cable for the shaver, toothbrush, and travel case.

    Reply

  7. Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (23)Thomas

    17 March 2024

    The output of the wall charger is 12v, and the USB specification is 5v. With the voltage mismatch, I would be surprised if connecting the two would work at all.

    Reply

    1. Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (24)Ionic Admin

      19 March 2024

      The charging case coverts the 12V from the wall charger to a 5V USB output.

      Reply

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Charging your toothbrush from 12V DC in a car, caravan, boat or RV - ToothbrushBattery.com (2024)

FAQs

Why is my Oral-B electric toothbrush not charging properly? ›

Make sure you are not charging the toothbrush on a metal surface. The metal can interfere with the charging process. With our Vitality and PRO toothbrushes, it can sometimes be difficult to know when they're correctly switched off. If they're on the charger while switched on, they won't charge correctly.

How many amps does a toothbrush charger use? ›

Ratings of commonly used household appliances
Domestic Portable ApplianceAmps Usedinformation
Toothbrush charger<0.5Most modern chargers are <1W. However, some older chargers can be up to 2.5W.
47 more rows

How to charge an electric toothbrush without a shaver socket? ›

You can buy adapters that go in a normal plug socket but have two pins in them for the toothbrush charger. I have an adaptor plug for mine I think you can buy them in the supermarkets. OP if you have a 2 pin US to UK adaptor that works. The pound shops sell the adapters as so all supermarkets.

How do I tell if my Oral-B toothbrush is charging? ›

The best way to check whether these brushes are charging is to pick the toothbrush up off the charger after 30 mins and switch it on, if it comes to life you know that the juice is flowing and can switch it off and leave it on the charging stand for the full 16 hours it needs to retain a full charge.

Should my Oral-B toothbrush light up when charging? ›

However, if doesn't switch on, that might mean that it wasn't switched off during charging. All our toothbrushes apart from the Vitality and PRO 500 have a charging light. It should blink green during charging.

What voltage should I charge my electric toothbrush? ›

Many modern electric brushes run on low voltage levels, usually 12 V or less. Some charging units have a step-down transformer that powers the toothbrush but the majority have batteries fitted into the handle.

Should you leave your electric toothbrush on the charger all the time? ›

You may leave your toothbrush on a plugged-in charger between brushing as this will not affect the battery lifespan.

How many watts does it take to charge a toothbrush? ›

Wattage requirements of selected home appliances
Approximate Wattage Requirements For Common Appliances
Whirlpool bath750
Hair Curler750
Electric Toothbrush6
General Household
97 more rows

What plug is a toothbrush charger? ›

The Boots Two Pin Adaptor plug is a quick and convenient way to convert your mains powered shaver or toothbrush to the standard 3 pin plug. Whether charging or using corded you will need this to use your electrical product.

Do toothbrush chargers use electricity when not connected? ›

Does an induction toothbrush charger still use electricity if there is no toothbrush attached? Yes, but very little. I tried measuring mine, but my wattmeter said 0.0 watt. That means it uses less than a tenth of a watt.

How long should an Oral-B electric toothbrush last? ›

The average lifespan of an Oral-B electric toothbrush and its charger is approximately 3-5 years, depending on the model and the whether the toothbrush has been used as intended.

Can you replace an Oral-B toothbrush battery? ›

No, you cannot replace the battery in your Oral-B electric toothbrush. The battery is contained within the electronics of the toothbrush handle and the unit is then sealed to keep it water tight.

Is it bad to leave Oral-B toothbrush on charger? ›

As a rule, it's safe to leave your toothbrush on the charger. The charging stand serves two purposes. The first is to provide a place for the toothbrush to sit when it's not being used. Secondly, it's a quick and convenient way of recharging when the battery is low.

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