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"Topping off" Lipo Battery

Old 04-19-2008, 03:42 PM
  #1  
diverdon
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Default "Topping off" Lipo Battery

When I go "Flying" I don't use all of the charge in the battery .. Should I Recharge it before I go again the one 3 cell battery has 11.9 volts in it and is a 2200 mah battery .. I am not trying to get ut of recharging it .. Just don't want to hurt it ..

So what do you think ?? To Recharge or not .. That is the question.. You see I usually don't make it long enough before I have broken the plane in such a way that it is un flyable ..so do I go ahead and recharge it anyhow or not ??? Thanks Again ... Don (Crash) J.
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Old 04-19-2008, 03:46 PM
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firemanbill
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I always put mine in the pane with a full charge for the first flight.

Now if I've been up for a short flight and say, fly another plane, I may take the first one up again without recharging if I know it has enough juice.

But for the flirst flight of the day it's always a full charge even if it means just topping it off before i head out.
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Old 04-19-2008, 03:47 PM
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Rodneh
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Depends on the way your ESC is set up. As long as it will not mistakenly think it is a 2 cell battery and change the cutoff to to low a value , you do not have to recharge or top off but; it there is a chance of this, always start with a fully charged battery or you may destroy the battery by draining it below limits.
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Old 04-19-2008, 03:57 PM
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idealhobbies
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I always top off.
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Old 04-19-2008, 05:33 PM
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diverdon
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Thanks you all .. I guess the only question is .. Will it hurt the battery to top it off ?
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Old 04-19-2008, 06:24 PM
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Bub Steve
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Originally Posted by diverdon View Post
Thanks you all .. I guess the only question is .. Will it hurt the battery to top it off ?
Unlike Nicads it doesn't hurt lipos to charge-um from any state their at, your bub, steve
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Old 04-20-2008, 12:52 AM
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Biplane Murphy
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I always start a flight with a fully charged battery, and charge em up after every flight before flying with that battery again.
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Old 04-25-2008, 04:48 AM
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GeneH
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One note of caution: make sure your battery charger recognizes a 3 cell and not 4 cells. If the voltage is still high, and you want to top off, the charger might think it's a 4 cell and will charge to a higher voltage, with potentially disastrous results.

Gene
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Old 04-25-2008, 04:53 AM
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Biplane Murphy
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Originally Posted by GeneH View Post
One note of caution: make sure your battery charger recognizes a 3 cell and not 4 cells. If the voltage is still high, and you want to top off, the charger might think it's a 4 cell and will charge to a higher voltage, with potentially disastrous results.

Gene
Hi Gene...

Hope everything is going well up in the ole "Fort"......Say hi to all the guys for me.
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Old 04-27-2008, 04:43 PM
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jswigart
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Some esc's measure your voltage at the start of flight and shut off at 70%. If your lipo is already down to 60% when you start the flight, you may drain it to a point where it will be damaged.
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Old 04-28-2008, 08:26 AM
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humboldt guy
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I always top off. I'm using a Cellpro 4s charger which always recognizes the correct cell count. There is no chance of damaging the lipo's by topping off.
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Old 04-28-2008, 10:18 AM
  #12  
crash-happy
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im a noob but if i use my heli i charge the batery every time before hand....
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