do i discharge a lipo and lipo readings 15c/24c burst

[aongoco]

whats up heli freak!!!!!! HAPPY EASTER

i have a thunder power 1010c with the 210 balancer connected.

i have trex450 which runs 3 cell 2100mah 15c/24c burst
and trex 600 which runs 6 cell 5000mah 25c/50c burst

can some1 explain what mah is??? and 15c/24c burst???

how do i discharge my lipo batteries safely is there a formula??

[fsusmithc2]

I can give you some basic info but I have never used the 1010 or 210 so I will refrain from specifics too much there.

mAh stands for miliamp hours and is a measure of a battery's capacity. If you divide that by 1000 to get Ah, or amp hours, you'll have the number more commonly used on the charger side of things. the xC/xC burst notation refers to the maximum sustained and short burst current you can draw from that battery.

Taking your 6s as an example: 5000mAh means that if you were to discharge at a constant 5A, it would take one hour to be fully discharged. 25c/50c means that you can discharge at a constant current of 25 times capacity, or 125A and you can have a momentary peak draw of 50 times capacity, or 250A.

Generally speaking, it is safest to discharge lipos no more than 80%, leaving 20%, also called the 80/20 rule. Discharging by flying is easiest but if you have to, you can also discharge manually if your charger can support it. Probably not a good idea to discharge too fast on the bench though. If I were to do it, probably no more than 1 or 2 times capacity.

As for charging, the safest bet is 1C or, in the case of your 5000mAh pack, no more than a 5A charge current. Some chargers and packs make claims that you can charge higher than 1C but check your instructions for each before trying it.

Hope that helps some.

[aongoco]

if i was to discharge my lipo which my 1010 charger has a discharge. at what amps do i discharge it as.

[fsusmithc2]

I would guess that it would be safe to discharge up to whatever the sustained max discharge rate is (15c for your 3-cell, 25c for your 6-cell) but I'm pretty sure you wouldn't want to come near that for safety and pack health reasons. Besides, I don't think there's a charger out there that can put that high of a constant load on something.

If I were you, I'd say a 2c discharge rate is probably good enough and it would be fully discharged in 30 minutes that way. Probably couldn't go too much higher than that with the 1010 anyway. What's the max discharge, 10A? If it is, that would be as high as you can go for your 6s pack and that would put you right at 2c, well short of the 125A max sustained current the battery can handle. 2c discharge on your 3s pack would be 4.2A.

I haven't really done much cycleing and discharging since I haven't had a good charger to do it with until I got the TP 610c just recently so if there's anyone else out there that can validate/correct my discharge theory for aongoco here, be my guest.

[Pinecone]

Why do you want to discharge your lipos? DO NOT cycle them like you do NiCds and NiMH.

The only time you need tio discharge them is if you charged them up and will not be flhing for more than a couple of weeks. Then discahrge them down to 3.8 volts per cell.