30C Continuous(ish) Lipo Discharge

[hoober]

Looking at the numbers they tested a good 5-8C pack , it never really made 30C. The pack should've been done at around 10C or so. It is customary to progressively go higher until one reaches the point of "max C" so that the other tests aren't lost.

[hoober]

LiCoO2 , whose pack is this? Venom perhaps? flightpower or a mis-print?

[hoober]

I can guaruntee that "another" brand would be much more accurate in it's labeling. I have enough experience in watching voltages at differing currents to label this pack as a "cheap, generic, e-bay type" pack. There are really some that will deliver very close to what they are rated.

My guess is that this was a hard pack to start out.

[suicideneil]

It definately matter which brand it is, but without comparitive testing the reult is pretty meaningless regardless of the brand- I think they didnt name the brand because of this very reason + the possibility of the test & results being called liable/ slander ( picking on one brand instead of several ). Indeed, if most packs performed like this you'd know the ratings system was just bollocks, but if this was just a cheapo pack & high-end packs performed much better/ closer to rated spec, you'd know your money was well spent or not..

[rabosi]

It is an exception rather than a rule that businesses correctly state their product's capability unless specifically directed to do so. I think that's pretty much all they were trying to say. Without industry standards and independent testing we have no idea if we are actually getting what we paid for.

[zeropointbug]

Yeah, I would have to say either state the brand AND test several brand packs, or don't do a single pack test at all, means diddly squat! It doesn't tell anyone anything.

Agreed that C ratings should be changed to a more real world and easily understandable term as pack Ri, have a standard test for a pack take the Ri at the middle of the discharge? At a standard C discharge, say 10-20C.

Besides, you can't draw the currents from a 30C pack from wires and deans plug anyways, the losses are so great in the wire itself, the solder might have melted, especially if the pack was larger.

hoober, I would agree with you that this pack is obviously a low end cheapy pack, no high quality lipo pack drops that much voltage in 10 seconds.

[zeropointbug]

everydayflyer over at RCGroups forum has tested Hyperion G3 packs, both 35 and 45C EX packs at near their limits, they always do fine throughout the discharge.

http://www.rcgroups.com/forums/showthread.php?t=1242354

[JThiessen]

Thanks ZP - that was good data. I've bookmarked his thread (especially since I'm now converting to Hyperions...!)