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› New lipo conditioning/break in
10-13-2005 04:34 PM  13 years agoPost 1
GScott

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Lewis Center, OH

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I'm a nitro heli person but have recently built a T-Rex to fly as well. I have a 3s 2100Mah lipo but I don't know what I should do to condition it before it's first flight. I've read 3 charge cycles but I have also read that discharging a lipo too much will kill it. I have a Multiplex charger that can charge/discharge lipos (Similar to the Prodigy) but I don't know what settings I should use for the discharge. Can anyone provide some insight? Thanks.

Gary

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10-13-2005 07:42 PM  13 years agoPost 2
Rob_T

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The best break in is to charge the battery and then fly gently for several short flights. Aim to fly 3 short flights with cooling off periods rather than 1 long flight. Just avoid loading the battery by pulling full collective for the first 2 charges.

I dont think the discharge currents available with most chargers are enough to condition a battery for the loads it will see in flight, so while its good to check the battery by cycling it, you should still stick to the break in routine above for the first 1 or 2 charges.

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10-14-2005 09:12 PM  13 years agoPost 3
rroback

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Irvine (UCI), Ca

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The longer the break in the better. I personally charge the pack, and discharge it very little, in your base, maybe 500 mah, max, and charge it again. I do that about three times, at around maybe 1-3c, so i'd say discharge around 2.5 amps for your pack. After those first few cycles, start using the pack in the heli, but do very short flights, maybe 1/4 of what you normally do. do about 5 of those, then start using the pack normally. This has worked for me, with all my packs, from my few 2s, 340mah packs, to my 800 dollar 10s3p,10s4p packs...

Rhett..... I can't fly, but the Profi sure can.

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10-17-2005 07:06 PM  13 years agoPost 4
tman52804

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Davenport, IA

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What about storage? If I'm done using the packs for the season, how should I leave them, fully charged, etc..?

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10-17-2005 08:43 PM  13 years agoPost 5
Rob_T

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Store with 50% charge in a cool (not freezing) place. (You dont need to be precise with the 50%, just "about half charged" is good enough.)

The reasoning behind this is that lipos deteriorate more rapidly (permanently loose capacity) while fully charged and at higher temperatures. If you store a lipo completely empty there is some risk that leakage currents could discharge it below the minimum acceptable, causing permanent damage.

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10-17-2005 09:28 PM  13 years agoPost 6
rroback

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Irvine (UCI), Ca

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A normal room temp ( 65-75) would be fine for storage.

Rhett..... I can't fly, but the Profi sure can.

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