Thread: EP4200's
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Old 09-02-2007, 04:05 AM   #6
SlowerOne
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Join Date: Jun 2005
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First off, you need to read more threads from forums outside the USA, and you will see that there are as many on NiMH issues too. Secondly, the issue with LiPo is that problems can occur when the cells are unattended and not in operation. Thirdly, there is a large concern that users will not follow the instructions, and when this happens there will be problems.

Next, the concern is that if you don't follow the instructions, the cells can go dead in just a couple of low-discharges or overuse. LiPos seem easy to use because our greatest experience is in domestic goods ('phones, laptops, etc.) and these contain sophisticated systems to prevent operator error - they look easy to use because they are error-proofed.

Lastly, and most importantly, the method of LiPo manufacture can be reduced to a level where the dangers are built-in by the manufacturer. This cannot happen with NiMH. Any NiMH cell can be airfreighted anywhere by anyone. Only two manufacturer's of LiPo are approved by IATA for air freight - that tells you something.

If you want to flame NiMH, go right ahead. If you want to know why LiPo are of much greater safety concern when cheap ones are in use, do some homework. You'll find that cheap LiPo are an accident waiting to happen, whereas cheap NiMH are not. Expensive NiMH are at the limit of the technology, and sometimes they fail - that's life. It's no different to the many brushless rotor failures of last year, it's just the price you pay for taking technology to the edge. That's why I don't flame the NiMH producers.

Orion (Kokam) are very high quality, with built-in safety measures, can be shipped by air freight, and you see almost zero complaints. Go on to a 'flying' forum and look for issues with cheaper LiPos and you'll be at your screen for hours!! That's why I flame cheap LiPo - people don't like cheap LiPo, they suck.
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