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LCD adaptor for power supply?

Old 08-23-2008, 11:47 PM
  #1  
skylane42
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Default LCD adaptor for power supply?

Anyone tried one of these as a power supply for a charger?

http://cgi.ebay.com/AC-POWER-ADAPTER...QQcmdZViewItem
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Old 08-24-2008, 02:19 AM
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Heli Jim
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Boy that looks like a good one.

5 Amp 12 Volt supply for less that $15 delivered.

I paid $20 (plus shipping) for mine.

I can't see any reason why that wouldn't work
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Old 08-24-2008, 04:21 AM
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rcflyair
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I use one very much like it (same specs.) and it works great!
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Old 08-24-2008, 05:03 PM
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Sir Raleigh
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I'm using a Nintendo GameCube power adapter. Although the output is only 3.5 Amps it's still good enough to run my GT Power A6 charger and charge 2200 mAh Lipos and it cost me $5.00 at the Flea Market.
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Old 08-25-2008, 02:11 AM
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btsai
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Did you guys that use one of those make an adapter for your charger plugs or just snip the end and put on a matching connector? Pictures?
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Old 08-25-2008, 04:23 AM
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Sir Raleigh
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I put a cigarette lighter socket on the power supply and a cigarette lighter plug on the charger. That way I can plug my charger either into the power supply or the cigarette lighter socket in the car. I don't use the alligator clips at all.
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Old 08-25-2008, 01:21 PM
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skylane42
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After wearing my car battery down to the point that it would not start, I try to stay away from using the cigarette plug in or the power plug in my car. That is why the AC power adaptor.
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Old 08-25-2008, 03:47 PM
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Sir Raleigh
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These portable power packs also have a cigarette lighter socket.

I also have a cigarette lighter jack to alligator clips adapter so I can connect directly to my car battery if I want to since the cig lighter socket in the car turns off with the ignition key.

I just thought it would be more convenient to have the cig plug on the end instead of having to fumble around with alligator clips all the time.
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Old 08-25-2008, 04:29 PM
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Lieutenant Loughead
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Personally, I'd look for one that is 13.5 volts, instead of 12.0 volts.

However, it should work just fine for you.
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Old 08-25-2008, 04:44 PM
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SkunkyMagoo
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Originally Posted by Lieutenant Loughead View Post
Personally, I'd look for one that is 13.5 volts, instead of 12.0 volts.

However, it should work just fine for you.
What is an extra 7 watts going to do?
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Old 08-25-2008, 04:59 PM
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Lieutenant Loughead
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It's not about the watts -- it's about the voltage. When you connect your battery charger to a 12-volt car battery, you aren't getting 12.0 volts; you're getting 13.5 volts.

Our chargers have a regulator inside them, which allow higher voltages to be converted to the voltage necessary to charge our LiPos... A fully charged 3s LiPo is going to be roughly 12.5 volts.

Your charger CAN do it, but you're asking it to take 12 volts, and convert it to 12.5 volts (or even higher (maybe 14 volts?), during your 3s LiPo charge cycle). In order to do this, you're going to lose some of your AMP capacity (due to the voltage conversion, the heat dissipated, and other losses in the conversion system).

If you start with a 13.5 volt power supply, the conversion is cleaner -- with much less "waste".

Take a look at this charger (it's one I happen to own). The input voltage range is 11 to 15 volts. If you read the manual, the following statement is included: "Applying less than 11V to the inputs will not be sufficient power to allow the charger to work properly."

If you start with 12.0 volts, and try to convert that to charge a 3s LiPo, your input voltage could (depending on the amps the power supply can deliver) get dragged down below 11 volts... :o
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