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11 posts tagged with volts.

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## Too many volts?

I'm moving into a new (to me) NYC apartment, and I need to buy two window-unit air conditioners. The super said that the power there is 110 volts, but the ACs I want are 115 volts. Is that a problem? [more inside]

## Where to learn about 12v DC electrical type stuff?

I'd like to learn about the basics of 12v electrics. I'm looking for recommendations for books, videos, websites, etc. [more inside]

## What matters when buying a laptop battery?

How can I be sure that I didn't get ripped off with a replacement laptop battery with regards to number of cells, voltages and mAh ratings? [more inside]

## oh brother

Need a step-down converter for plugging a printer sold in the US (110V power) into a 3rd-world socket (240V power). I get the voltage part but watts and amps and such are a bit beyond my electronoobicity. [more inside]

## What's the 220 V equivalent of a 120 V 40 W lightbulb?

What's the 220 V equivalent of a 120 V 40 W lightbulb? [more inside]

## The little PA system that could, I hope.

Will I blow up my PA system? A question of ohms, watts, speakers, amps and the love affair that almost tore them all apart. [more inside]

## Thanking Count Alessandro Giuseppe Antonio Anastasio Volta

How can I identify the approximate properties of an electrical transformer? [more inside]

## Finding the right AC adapter.

Where can I find a 2/3a 700mAh 2.4v AC adapter? [more inside]

## Is my new (aftermarket) power adapter safe for my laptop?

Can I damage my laptop by using a power adapter that has a slightly higher wattage than the original adapter? The original adapter was 65W, and the aftermarket one is 70W. The voltage is switchable. My original adapter had a voltage of 18.5V, this one says that if I need 18.5V, I should choose 18V.
Any chance of damaging the computer by using this one? [more inside]

## Why doesn't wattage equal amperage times voltage?

Another air conditioning question for the summer! 4.8 A *110V=515W? [more inside]

## I need a UK to US transformer for a rechargeable drill.

TransformerFilter: I've just relocated to the US and have a rechargeable drill that uses a 17V DC transformer. I need to replace the transformer, since the one I have runs on 240V power (and has the UK prongs). The problem here is that I can't find a suitable replacement at the likely suspect places: hardware stores, Radio Shack...

I know that the voltage must match precisely and that the amperage must be at least as high as the noted amperage, and that the polarity must also match. So where can I go to find a good transformer? I'm in NYC, but I prefer to shop online.

I know that the voltage must match precisely and that the amperage must be at least as high as the noted amperage, and that the polarity must also match. So where can I go to find a good transformer? I'm in NYC, but I prefer to shop online.

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