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Old Mar 26, 2012, 01:25 AM
BillzillaAus is offline
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Help!

First charge of Lipo after it's been sitting for a while


I bought a couple of Turnigy 6S 5800 mah batteries for a large project of mine (still being built) a few months ago and haven't used them yet so they've just been sitting around.
I'm getting charger in a kit with another project that is capable of charging them, I was after recommendations as to how to go about charging them for the first time and if they need a cycle or two on the discharger
Any suggestions ?
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Old Mar 26, 2012, 03:28 AM
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Just charge them at 1C or 5.8amps each. If they have been flown and cycled before no use breaking them in, just go out and fly .
Old Mar 26, 2012, 05:15 AM
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Thanks.
As mentioned in the first post though, they've never been used before.
Old Mar 26, 2012, 06:17 AM
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Charge them at 1C. No need to cycle them, just take it easy for the first flights. Make the first few flights short to find out how much your taking out on a recharge. Set the timer so your putting back in about 80% of the rated capacity. One of the hardest things for the batt. is running them too low.

Gord.
Old Mar 26, 2012, 06:20 AM
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Thanks again.
The first flight is likely to be still some time away (I'm a slow builder and have many other projects at the moment) but I will be using the Quanum voltage sensor to tell me the voltage state in-flight and yes, I'll be making the first few short and light-duty.
Old Mar 26, 2012, 09:36 PM
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Before you charger them I would measure each cell voltage to see what you have.
Some guys have reported bad cells after they charged their packs and thought it was the charger.
I wouldn't charge them till they were needed.

I disagree with the previous posts about "break-in".

LiPo should have a break-in that consists of -
Balance charge at 1 C.
Discharge (fly) to about 50%, gently.
Repeat 5 times.

A few other LiPo care items -
Don't store at more then 4.0V for more than a day.
LiPos never need "cycling".
Don't discharge more than 80% of the rated packs capacity.
Balance charge them.
Don't drop one on the floor.(damage or dent it).
Store in a cool, dry place. ( not in the car, in the sun).
Don't charge completely unattended. (if you value your home)

And watch out for fires.
Old Mar 27, 2012, 03:12 AM
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Good advice, thanks.
So I'll just leave them as-is until I need them.
Old Mar 27, 2012, 03:36 AM
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Oops sorry about that Bill, misread the post there. If you haven't used them and do not plan to for a while, go ahead and store them in an airtight container and put them in your refrigerator until your ready to start using them. No sense leaving them out.

For break in, WoodCrafter gave great advice, just follow his recommendations and you should be all set.
Old Mar 27, 2012, 05:37 AM
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Okay, in the fridge they go then.
(Have to be careful when going for the midnight munchies)
Old Mar 27, 2012, 02:21 PM
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Haha I got mine in the humidity control/vegetable tray. No need to worry about accidentally going for a midnight snack there :P.

When you take the batteries out, let them sit for about an hour before taking them out of the bag/tupperware so the condensation builds on the outside, and not on the batteries themselves. Storing them like this will help prolong your useful battery life.
Old Mar 27, 2012, 08:57 PM
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[QUOTE=Shortman;21158051
When you take the batteries out, let them sit for about an hour before taking them out of the bag/tupperware so the condensation builds on the outside, and not on the batteries themselves. Storing them like this will help prolong your useful battery life.[/QUOTE]

Excellent advise.


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