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Lipo Battery: Good or Bad:

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Old 08-13-2017, 09:46 AM
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Electriceddie
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Default Lipo Battery: Good or Bad:

Hi Guys,

I have a Lipo Battery that has been used only 4-5 times and on and off and in the shop for set up and testing purposes. I have some Pics included below. It seems like there may be a slight swelling or is that just the way the plastic wrapping looks. Its about a year and a half old. I have not charged it more then 4-5 times. It seems to work fine and when I charge it I get good results with the GP Triton EQ Charger. I have 6 pics here just because one or two look deceiving and I did not want anyone to get the wrong impression.

Let me know what you guys think?

Thanks

Ed
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Last edited by Electriceddie; 08-13-2017 at 09:53 AM.
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Old 08-13-2017, 09:59 AM
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Eddie , the best "judgement call" would be to compare it to what it looked/felt like when it was brand new . If from day one out of the package it looked like that then I'd say it's likely ok . But if it was perfectly flat & square on all sides when brand new and now has that kinda roundish appearance , then yea it does look a bit puffy and suspect .

I know your not gonna want to hear this , but in matters of lipo safety I always defer to the same rule as for leftover food ; "When in doubt , throw it out" . Neither food posioning nor lipo fires are a thing to be trifled with ....
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Old 08-14-2017, 05:31 AM
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^^^^ What he said ^^^^
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Old 08-22-2017, 01:18 AM
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Seems to be not so bad from its cover.
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Old 08-22-2017, 11:14 AM
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Cycle it a few times and check the voltage of each cell after each cycle. If any two cells are more than 2/10 of a volt apart I would consider getting rid of it. You should not store lipos for long periods of time fully charged. Always discharge to 3.8 vols per cell for long term storage.
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Old 08-27-2017, 03:33 PM
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Quote:
Originally Posted by raptureboy View Post
Cycle it a few times and check the voltage of each cell after each cycle. If any two cells are more than 2/10 of a volt apart I would consider getting rid of it. You should not store lipos for long periods of time fully charged. Always discharge to 3.8 vols per cell for long term storage.

Hi Raptureboy,
  • I thought that the Lipo batteries should be at 3.8 volts per cell all the time.
  • If not what should the range be that they work in, from the just charged state to run down state and needing a charge?
  • Also do you know if there is a way to measure the RPM of an electric ducted fan motor?
I know its been a few days but I wanted to fly it again and see the results and get back to the forum here?

Thanks
Ed

Last edited by Electriceddie; 08-27-2017 at 03:39 PM.
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Old 10-03-2017, 09:28 AM
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I would still run it personally as long as the voltage is good, but i would take extra care when charging it just in case, e.g. be present to deal with any problems.
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Old 10-03-2017, 02:20 PM
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what's the IR
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