[NSRCA-discussion] Li-Po Battery disposal - Best way

Mon Apr 18 18:43:01 AKDT 2016

Jay, I live on the ocean and I once placed a 3 cell pak in the water in my
back yard for 4 days and
when I took it in the house after this time period and checked the voltage
it was still reading 3.6 volts.
I felt like maybe it needed a little more time, but not really sure.

On Mon, Apr 18, 2016 at 8:38 PM, Jay Gerber via NSRCA-discussion <
nsrca-discussion at lists.nsrca.org> wrote:

> Will do Keith…..hey, already have an escape plan and location that is non
> toxic to do the experiment….. J Jay
>
>
>
> *From:* NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org]
> *On Behalf Of *Keith Hoard via NSRCA-discussion
> *Sent:* Monday, April 18, 2016 5:59 PM
> *To:* 'General pattern discussion'
> *Subject:* Re: [NSRCA-discussion] Li-Po Battery disposal - Best way
>
>
>
> I’d recommend being outside with an escape plan for you and the lipo.  Let
> us know how it works out.
>
>
>
> -Keith Hoard
>
> -klhoard at outlook.com
>
>
>
> *From:* Jay Gerber [mailto:jaysgerber at earthlink.net
> <jaysgerber at earthlink.net>]
> *Sent:* Monday, April 18, 2016 16:46
> *To:* 'Keith Hoard' <klhoard at outlook.com>; 'General pattern discussion' <
> nsrca-discussion at lists.nsrca.org>
> *Subject:* RE: [NSRCA-discussion] Li-Po Battery disposal - Best way
>
>
>
> Interesting, never heard that analysis before….I’m going to be discharging
> some old 5S packs down the road and after a day or two in the bath, I’m
> going to open them up and see if that amount of time will cause issues
> leading to a false reading.  I would assume the volt meter would show an
> open circuit and not some sort of voltage, 0 or otherwise if the leads were
> in fact corroded and non functional.
>
> Thanks,
>
> Jay
>
>
>
>
>
> *From:* NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org
> <nsrca-discussion-bounces at lists.nsrca.org>] *On Behalf Of *Keith Hoard
> via NSRCA-discussion
> *Sent:* Monday, April 18, 2016 11:48 AM
> *To:* 'General pattern discussion'
> *Subject:* Re: [NSRCA-discussion] Li-Po Battery disposal - Best way
>
>
>
> Not if the internals are all corroded away.  They’ll show 0V but the pack
> is still charged.
>
>
>
> -Keith Hoard
>
> -klhoard at outlook.com
>
>
>
> *From:* NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org
> <nsrca-discussion-bounces at lists.nsrca.org>] *On Behalf Of *Jay Marshall
> via NSRCA-discussion
> *Sent:* Monday, April 18, 2016 10:45
> *To:* atwooddon at aol.com; 'General pattern discussion' <
> nsrca-discussion at lists.nsrca.org>
> *Subject:* Re: [NSRCA-discussion] Li-Po Battery disposal - Best way
>
>
>
> Old info.
>
> You can check each cell at the balance connector …..
>
>
>
> *Jay Marshall*
>
>
>
> *From:* NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org
> <nsrca-discussion-bounces at lists.nsrca.org>] *On Behalf Of *atwooddon---
> via NSRCA-discussion
> *Sent:* Monday, April 18, 2016 11:09 AM
> *To:* jaysgerber at earthlink.net; tewalker10 at yahoo.com;
> nsrca-discussion at lists.nsrca.org
> *Subject:* Re: [NSRCA-discussion] Li-Po Battery disposal - Best way
>
>
>
> The salt water bath approach has been floating around for quite some time,
> however, there is a* possible* issue with this approach.  Here is a
> section of an article from a club newsletter describing the possible
> issue.
>
> YMMV
> Don
>
> *Salt Water Bath.... NO!!!*
>
>
>
> There has been a discharge approach for lipos floating around the internet
> for quite some time. Somehow, it just won't die and go away so we will
> cover it here and maybe help someone reading this that thinks this will
> reliably discharge a lipo. Notice I said 'reliably'. The salt water bath
> approach 'might' work but there is no easy way to check whether it worked
> or not and you might be disposing a lipo you think is fully discharged but
> isn't.
>
>
>
> The theory..... Pure water will not conduct energy, in fact has almost
> infinite resistance. BUT, add some chemical like salt and it will conduct
> current very well. So, if we take water and add salt to it, drop a lipo
> pack in the salty water it should gradually/safely discharge the lipo to
> zero voltage over time by allowing current to flow between the positive and
> negative leads of the pack. Sounds good, right? Theoretically it should
> work... BUT it ignores the fact that the salty water will also cause a
> oxidation/corrosion process to occur as the energy flows across the
> connectors of the pack, including the aluminum connectors* inside* the
> pack. Over time, this oxidation/corrosion process eats away at the aluminum
> of the internal connectors of the lipo gradually dissolving it. Now, as
> soon as this process erodes the connector(s) to the point there is no
> connection between one or more of the cells of the lipo it will open the
> circuit and you will get a zero volt reading when you check the pack using
> the main leads. You can't see the internal connectors so you have no idea
> the reason you are getting a zero voltage reading externally is there is an
> 'open' in the internal circuit of the lipo pack. Of course, this might not
> occur and the salt water bath would be successful but you have no way of
> determining if it was actually successful without opening the pack up to
> verify each cell is zero voltage. So, that is the reason you shouldn't rely
> on the salt water bath to discharge lipo packs.
>
>
>
>
>
>
>
> -----Original Message-----
> From: Jay Gerber <jaysgerber at earthlink.net>
> To: 'Terrence Walker' <tewalker10 at yahoo.com>; 'General pattern
> discussion' <nsrca-discussion at lists.nsrca.org>; atwooddon <
> atwooddon at aol.com>
> Sent: Mon, Apr 18, 2016 6:39 am
> Subject: RE: [NSRCA-discussion] Li-Po Battery disposal - Best way
>
> For whatever it’s worth….If you can’t get to a battery disposal facility
> like Lowe’s, etc…..
>
>
>
> I have discharged batteries using a glass bowl (not metal) filled with a
> concentrated salt water solution.  2- 5S 5400 ma Lipos took about 2 days
> for them to get to 0.01 volts.  Yesterday I discharged 2 4S 2200 Lipos in a
> day to 0.00 volts with the same process.  No danger, just let them sit and
> maybe refresh the solution for the bigger batteries.  Leave a little longer
> and they will go to 0.00 volts
>
>
>
> Strip the leads staggered and watch that the positive lead doesn’t get
> caked up in a day or so.  It’s neat watching the bubbling taking place as
> the “electrons” flow out of the packs.
>
> Jay
>
>
>
> *From:* NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org
> <nsrca-discussion-bounces at lists.nsrca.org?>] *On Behalf Of *Terrence
> Walker via NSRCA-discussion
> *Sent:* Monday, April 18, 2016 12:44 AM
> *To:* atwooddon at aol.com; General pattern discussion
> *Subject:* Re: [NSRCA-discussion] Li-Po Battery disposal - Best way
>
>
>
> Hello Don,
>
>
>
> Long time no see. So I have an old 5000 10s flight pack that I want to
> fully discharge. How can a single 12v taillight bulb discharge this flight
> pack?
>
>
>
> Enquiring minds want to know ...
>
>
>
> Terry
>
>
> ------------------------------
>
> *From:* atwooddon--- via NSRCA-discussion <
> nsrca-discussion at lists.nsrca.org>
> *To:* ldiamond at diamondrc.com; nsrca-discussion at lists.nsrca.org
> *Sent:* Saturday, April 16, 2016 6:44 AM
> *Subject:* Re: [NSRCA-discussion] Li-Po Battery disposal - Best way
>
>
>
> The process I use is to fully discharge the pack using a automotive tail
> light bulb, strip the mail leads back a couple inches and twist them
> together then dispose of if in the trash.  Fully discharged, lipos pose no
> environmental dangers.
>
> Don
>
>
>
>
>
>
>
> -----Original Message-----
> From: Larry Diamond via NSRCA-discussion <nsrca-discussion at lists.nsrca.org
> >
> To: 'General pattern discussion' <nsrca-discussion at lists.nsrca.org>
> Sent: Sat, Apr 16, 2016 6:24 am
> Subject: [NSRCA-discussion] Li-Po Battery disposal - Best way
>
> I have a LiPo 5s 5000mAh pack that has a dead cell (1.6v).
>
>
>
> What is the best way to dispose of this battery?
>
>
>
> Larry Diamond
>
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