I have a Thunderpower 2 cell Lipo that now looks like a puffed u
pillow. Always checked that it did not go below minimum voltage an
charged at 1C or less.
Seems to still function, but I am wary of what it may do in the nex
days or so.
Any advice ??
TI
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indoruwe
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indoruwet's Profile:
It won't do much. Once this starts you might as well replace them.
The open circuit voltage will read 4.2/cell, but that's it. Once you apply
a load they cave.
IMMEDIATELY get it out of your house, garage or car and place it on a
non-flammable surface away from anything flammable. It is now junk and a
fire hazard. Look to Thunder Power's web site for disposal instructions.
Thanks guys, smacked it with an axe, and buried it in the yard.
As stated, not worth the possible bigger loss due to fire
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indoruwe
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indoruwet's Profile:
Not the best way to dispose of cells. Check this:
NiMH: place in regular trash.
- NiCd: recycle (cadmium is toxic).
- LiPo: puncture plastic envelope, immerse in salt water for several hours,
place in regular trash.
I punctured a Li-Po once, had a little glow and smoke to it. I took it in
the yard and dumped ice on it. no Prob.
Guess I'll get the salt water next time.
mk
Oops ....
Spelling mistake !! :eek:
Should have been : Burned it in the yard.
Made quite a mess tho ! :
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indoruwe
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indoruwet's Profile:
I get the impression that everyone is treating their LiPo packs as though
they are handgrenades with the pin about to fall out. What's the deal? I'm
new to these critters.
Ed Cregger
They aren't as bad as that, but they aren't as tame as other suggest. They
are DIFFERENT than what you are used to (NiCds, etc). Once you learn the
differences and the handling requirements, you should be fine.
This makes me wonder why/how anyone would sell them to people knowing full
well that they could burn down a dwelling. I take it that this phenomenon
isn't that common?
Ed Cregger
I bought a couple of Li-Poly packs a while back. I'll have to read the
material that came with them.
Yes, NiCads are excellent for exploding when shorted, etc. Nothing is
without risk.
Ed Cregger
"This makes me wonder why/how anyone would sell them to people knowing
full
well that they could burn down a dwelling. I take it that this
phenomenon
isn't that common? "
If you have common sense and treat the li-po batteries with respect you
probably will not have a problem. Make sure you use a Li-Po specific
charger. Do not charge at more than 1C(example, if you have a 2100mah
battery, charge at no more than 2.1 amps. 1320mah, charge at no more
than 1.3 amps, and so on). Do not exceed the maximum continuous amp
draw ratings for the battery.
Assuming you want to take your li-po flying, you need to measure the
amp draw to ensure you aren't pulling too much current. The way I do it
is to hook up an amp meter between the positive from the battery and
the positive to the model. The ground gets connected normally. Run the
model up to full throttle with the prop you intend to fly with and see
where the amp draw sits after a few seconds. The amps shown in this
configuration should be a worst-case scenario. If it is within the
limitations of the battery you should be fine. Otherwise you need to
explore options for reducing the amount of current, such as changing
the propellor, or perhaps reducing the size of the pinon gear on the
motor.
Chris
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