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Old 01-27-2013, 12:15 AM   #1
Westwind
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Default Batteries for light system

I have Ram 15, 04, and 16 light systems. I have spliced them together and run the system of a 9 volt battery. I would like to try ruining them off a turnigy nano-tech 370mah 25-40C battery. Ram says a 9 volt must be used. Can any one tell me if I well have problems running the turnigy batt

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Old 02-12-2013, 08:33 PM   #2
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You cannot attain 9 volts with a lipo battery. A lipo battery will have 3.7 volts per cell nominal and 4.2 volts fully charged. Thus, a 2 cell lipo fully charged would be 8.4 volts. A 3 cell lipo would be 12.6 volts fully charged. Your light system might work on 8.4 volts (although not as well as 9 volts). I wouldn't try it on 12.4 volts.
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Old 02-12-2013, 09:11 PM   #3
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You'd have to use some sort of voltage regulator with a 3-cell.

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Old 02-12-2013, 10:04 PM   #4
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http://www.wattflyer.com/forums/showthread.php?t=69616

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Old 02-12-2013, 10:43 PM   #5
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Deja vu!

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Old 02-13-2013, 03:55 AM   #6
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Originally Posted by Westwind View Post
I have Ram 15, 04, and 16 light systems. I have spliced them together and run the system of a 9 volt battery. I would like to try ruining them off a turnigy nano-tech 370mah 25-40C battery. Ram says a 9 volt must be used. Can any one tell me if I well have problems running the turnigy batt

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What you'd have to do is hook it up to your 9 volt battery, and measure the current pulled. Then install a series resistor for your 12 volt LiPo battery.

To calculate the resistor value, it would be resistor value equals (12 Volts minus 9 volts) divided by the current.

Example, if its 0.02 amperes, R=3/.02 or R=150 ohms. It's not critical, but don't go much below that 150 ohms. Then when you've got the resistor soldered in series, hook up the battery and again measure the current pulled. It should be close to the current off of your 9 volt battery.

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Old 02-13-2013, 04:27 AM   #7
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Once again guys thanks for you input. I realized that if i used a lipo i would probably run it down below 3v per cell by accedent so what i did was hook up a 1200 mah nimh batt at it wooks great.
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Old 02-13-2013, 05:15 AM   #8
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Originally Posted by Westwind View Post
Once again guys thanks for you input. I realized that if i used a lipo i would probably run it down below 3v per cell by accedent so what i did was hook up a 1200 mah nimh batt at it wooks great.
Yeah, I wondered about that, those old Nih cells really work well for this type of thing. They're rather hard to damage.

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