Quote:
Originally Posted by austinelse
...Brian- Stating that our packs are "crap", "don't perform", have the "highest failure rates" is basically saying that "MaxAmps sucks." Lets call a spade a spade and at least admit that what is happening in this thread is "bashing".
I have not seen one single person who is posting here who can actually give me a specific example of a problem that they have had with our pack quality, customer service, or company. If I missed one, feel free to call me personally about your specific experience and I will do whatever it takes to make it right.
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Are you referring to me? I don't believe I said MA packs are "crap", what I have said is that there is excessive voltage drop at much lower than the rated C rate. And I have commented about construction.
One example? How about three:
1: 2s1p 5Ah pack: Even in a light vehicle (~6lbs) geared for ~40mph, the pack got too hot for my liking (130*F at the end of the run) and I feared their life life would be shortened. This is from day 1. At the time, I did not have an accurate way to measure real current draw, but my runtime was right around 35 minutes. That's at 8.6A average current. Pretty high temp for the gentle use IMO. Since then, I've reconfigured two of those 2s packs into a single 4s pack for use in a low kv motor setup (Trx Slash) on 4s to reduce current and keep heat to a minimum.
2: And while on the topic of that 4s 5Ah pack, let's talk performance. Since I reconfigured the pack, I acquired an Eagletree logger and have an actual graph that shows the highest burst value of 61A (which is 12.2C) while the pack voltage fell to 12.48v (3
.12v/cell). And here is the graph if you like:
3: I have some 2s2p 8Ah packs. They worked ok in a Hyper8 buggy configured as 4s (saddle packs) with a Neu 1512/2d. Since then I redid the setup and wanted a single 4s2p pack, so I proceeded to take apart the pack to reconfigure it. The tabs used were substantially thinner than any other pack I have taken apart. I was able to seperate the tabs of the "2p" cell pairs
by hand, and without trying hard at all. That's not a solid solder job by anyone's standards. And, after bending the tab
once, they started to tear. I ended up throwing that pack out. I still have the other 2s2p 8Ah pack, but I won't touch it.
Is that detailed enough?