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Old Jun 21, 2007, 01:13 PM
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JT_Redmist's Avatar
Dublin, CA
Joined Jan 2007
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How long do you wait before charging?

Hi,
How long do you wait after a flight to charge your lipo? Do you let it cool a little for 10 - 15 mins. before charging? I don't have the luxury of many packs, so I'm just curious.

John
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Old Jun 21, 2007, 01:33 PM
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Mark Wood's Avatar
United States, CA, Bear Valley Springs
Joined Feb 2000
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I let them cool to ambient for the most part before recharging regardless of chemistry.

mw
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Old Jun 21, 2007, 01:40 PM
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wattsup_kz's Avatar
Kalamazoo, MI USA
Joined Aug 2003
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I have heard that it is not good to charge a warm pack, so I wait as well.
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Old Jun 21, 2007, 05:36 PM
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Cmiller's Avatar
Las Vegas
Joined May 2002
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What about using a pack warm/hot off the charger ???

My NiMh packs get warm/hot charging, not when I fly them.
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Old Jun 21, 2007, 05:37 PM
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Florence, Al
Joined Oct 2000
29,298 Posts
I usually don't charge a pack up until after I've gotten home with it, so it's usually ambient temp.. I try to bring enough packs so I don't have to "hot box" them on the charger..

Jeff
www.CommonSenseRC.com
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Old Jun 21, 2007, 06:47 PM
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Mark Wood's Avatar
United States, CA, Bear Valley Springs
Joined Feb 2000
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Quote:
Originally Posted by Cmiller
What about using a pack warm/hot off the charger ???

My NiMh packs get warm/hot charging, not when I fly them.
In the case of NiMh, it's better to use a pack HOC. More power due to the chemistry being more active.

mw
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Old Jun 21, 2007, 07:25 PM
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callen's Avatar
Parrish Fl
Joined Apr 2004
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Quote:
Originally Posted by Cmiller
What about using a pack warm/hot off the charger ???

My NiMh packs get warm/hot charging, not when I fly them.
Temeprature is the key.. always, always, always! IF THE PACK AIN'T WARM AT THE END OF THE CHARGE ROUTINE, IT AIN'T CHARGED! Note I said 'warm'. Not HOT! Hot is NEVER GOOD at the end of the charge routine.. but warm is OK. If using a temp probe, set it for 10 degrees above AMBIENT. If it's a peak controlled charger and the charger shuts down before the pack is slightly warm to the touch.. IT AIN'T FULLY CHARGED. If it's a timer controlled charger and at the end of the charge period the pack is not warm.. it's NOT fully charged yet! By far and away the biggest reason for low capacity numbers is undercharging.. if you have a 5 gallon pail with only 3 gallons in it, your only gonna get 3 gallons out of it. Engage your brain.. check temperature at the end of the charge routine!

No BS Batteries
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Old Jun 22, 2007, 11:56 AM
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Dublin, CA
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Thanks for all your help guys. I guess I need to invest in some more packs. Oh, the endless stuff to buy in this hobby

John
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