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power supply/charger problem

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Old 04-12-2007, 04:53 PM
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azouleym
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Default power supply/charger problem

Hi, i have the E-flight Celectra lipo charger, and i have run into a problem. i have asked a couple of people and they all argue. im trying to get ahold of someone with this particular charger to get info, but i think it is best if i just spread my question around.

my Celectra lipo 3 cell charger says....
Quote:
Supplying DC Power to the 1-3 cell Li-Po charger......
The Celectra™ 1–3 cell Li-Po charger is powered by connecting it to a 12V power source, such as a 12V sealed battery (HAN102), a 12V automobile battery (car must be not be running), a field box power panel or appropriate power supply. The battery capacity must be over 5Ah.
i have a 13.8 volt 3 amp power supply i was told by the company who sold me the celectra that this would work. i need to know if this would potentially damage my charger if i were to use this power supply. do i need to get a 12v 5 amp power supply?

i appreciat any information....thanx
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Old 04-12-2007, 04:58 PM
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Default RE: power supply/charger problem

Your power supply is about (13.8x3) 41 watts and will probably do a 40 watt job thru the charger. If you limit youir power usage to the 40 watts or a little less then it should be ok.

An easy example is a 3S lipo at 3 amps. (12.5 volts x 3 amps= 37.5 watts) Your battery may or may not be able to handle 3 amps and if by chance it is smaller than 3S3000 mah then you got it made . If it is bigger then perhaps it can be charged using somethng less than 3 amps and will just take longer.
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Old 04-12-2007, 05:16 PM
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Default RE: power supply/charger problem

well....my lipo battery is a thunder power 3 cell 2070mah battery. the retailer said as long as i use a battery that is under 3 amps....(3000mah) the thing will work. being i am at just over 2 amps....saposedly i can set the charger at 2 amps, and it should work......but what about the voltage? is 13.8 to much for the charger being it is saposed to take in 12V.....?
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Old 04-12-2007, 06:23 PM
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Default RE: power supply/charger problem

No, itf it's a 3S capable charger then it should charge to the full 12.6 volts anyways. At two amps you should be in fine shape using it.
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Old 04-12-2007, 06:49 PM
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Default RE: power supply/charger problem

...lol.....no im not worried about charging the battery. what my proble is, is my Celectra Lipo charger states that it in order for the charger to work it needs a

"power source, such as a 12V sealed battery (HAN102), a 12V automobile battery (car must be not be running), a field box power panel or appropriate power supply. The battery capacity must be over 5Ah."

i have a power supply that gives 13.8 volts not 12. .....im thinking that i may damage the charger and the battery if i use this power supply.
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Old 04-12-2007, 07:25 PM
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Default RE: power supply/charger problem

Oh, it should be fine as "12 volts" is a nominal voltage and is not uncommon for a battery to be 13.6 or 13.8.
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Old 04-13-2007, 12:08 PM
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Default RE: power supply/charger problem

ok...i have one more.....when the instructions (above...last line) say the battery capasity must be above 5 ah what is that refering to?
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Old 04-13-2007, 12:11 PM
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Default RE: power supply/charger problem

That's referring to the power source battery if you run it from a 12 volt battery (like a car battery or lawn mower battery)
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Old 11-13-2007, 11:17 PM
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Default RE: power supply/charger problem

i actually have a power supply with 13.8 volts of power and 10 amps I have been useing it for 8 years now and have had at least 6 chargers and never had problems
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