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Old 14-12-2011, 09:22   #1
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inverter takes out charger

lads here is one for you.anytime i charge my electric toothbrush through my inverter the charger dies after a few uses.i now own several brushes and one working charger!has it something to do with sine waves...?
dave
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Old 14-12-2011, 09:26   #2
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Re: inverter takes out charger

Yeah, very likely. You need a pure sine wave inverter.

Those marketed as "modified sine wave" are actually modified square wave; some electronics, including small wall-wart chargers, don't like them worth a darn.

Bill
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Old 14-12-2011, 09:29   #3
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Re: inverter takes out charger

Yup.
You need a sinewave for some electronic devices.
The only things that work just as well on a modified sine are heat producing items and incandescent lights (also technically heat producing items).
Motors run hotter, although most work ok on a modified sine.

I purchased one of these a couple of years ago. No frills, but it works well:
(No financial ties, just a happy customer)

OSP 1500W PURE SINE WAVE POWER INVERTER 1500 3000 WATT | eBay

Wife loves it. She can run her VitaMix on it to make smoothies, and I can run a big shop vac on it as well.
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Old 14-12-2011, 09:34   #4
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Re: inverter takes out charger

lads,thanks for such an informative and quick response,my first thread!this is a great forum,thanks again and fair weather to you
dave
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Old 14-12-2011, 09:50   #5
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Re: inverter takes out charger

Quote:
Originally Posted by davehen View Post
lads here is one for you.anytime i charge my electric toothbrush through my inverter the charger dies after a few uses.i now own several brushes and one working charger!has it something to do with sine waves...?
dave
My wife's electric toothbrush doesn't charge properly even though my charger ( Xantrex ProSine ) IS a pure sine wave charger. It goes flat again very quickly.There is something weird about the way these electric toothbrush chargers work.
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Old 14-12-2011, 10:40   #6
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Re: inverter takes out charger

I use an Oral B toothbrush that takes a AA battery. I use a rechargeable that lasts about 4-5 months and can be recharged from 12v.. One less thing to use the inverter for.
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Old 20-12-2011, 10:48   #7
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Re: inverter takes out charger

As posted many chargers do not like modified sine wave inverters. The chargers for my drill batteries (Craftsman) specifically state "do not use with any inverter."

I have no experience with electric toothbrushes - I use a manual.
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