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#142068 - 12/01/04 09:29 AM U.S. Battery charger U.K. 110 volt supply  
davelloyd  Offline
Member
Joined: Nov 2004
Posts: 24
U.K.
Hello,

Thanks for the help with using my power tools on the U.K. 110 volt supply.

I have an american Makita battery charger that is marke 120 volt 50/60Hz. It is also marked for the correct battery I'm charging.

Just wondered if the input voltage of 110 volts has any effect on how these things work.

Regards

David Lloyd


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#142069 - 12/01/04 04:07 PM Re: U.S. Battery charger U.K. 110 volt supply  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,211
SI,New Zealand
Dave,
I'd imagine that you could expect a slightly lower output from the Charger, it wouldn't be much though. [Linked Image]


Let's face it, these days if you're not young, you're old - Red Green grin

#142070 - 12/01/04 04:17 PM Re: U.S. Battery charger U.K. 110 volt supply  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
The chargers for power-tool batteries (which I assume this is) have regulator circuitry which will almost certainly adjust for the slightly reduced input. Don;t forget that the 110 and 120V rating are only nominal voltages.

An American 120V supply can drop several volts under load, and a U.K. 110V site transformer can easily be a few volts over if not fully loaded.


#142071 - 12/01/04 08:51 PM Re: U.S. Battery charger U.K. 110 volt supply  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,211
SI,New Zealand
Good point Paul!. [Linked Image]
I was under the impression that a Voltage regulator in this case, only adjusted downwards, not upwards as well?.


Let's face it, these days if you're not young, you're old - Red Green grin

#142072 - 12/02/04 04:45 PM Re: U.S. Battery charger U.K. 110 volt supply  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
The usual types of regulators can indeed only adjust downward from whatever voltage is fed into them, but the supplies are designed in such a way that the input voltage will still be sufficient even when the AC line drops to its lower limit.


#142073 - 12/06/04 02:00 PM Re: U.S. Battery charger U.K. 110 volt supply  
IanR  Offline
Member
Joined: Dec 2004
Posts: 328
Palm Bay FL USA
You should probably be allright, as a bunch of these chargers use switching power supplies nowadays. They will adjust internally to accomidate for line voltage variations. Even if your charger is one of the lower tech xfrmr types it will most likely be no problem as 110V is well within tolerance here in the states.
Ian



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