[NSRCA-discussion] Li-Po Question

[Jay Marshall]

Same way I discharged mine (accidently).Leave them in the plane with all
switches on (but for safety, disconnect one of the motor wires) lol

 

Jay Marshall 

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of
AtwoodDon at aol.com
Sent: Sunday, August 30, 2009 10:17 AM
To: nsrca-discussion at lists.nsrca.org
Subject: Re: [NSRCA-discussion] Li-Po Question

 

There are many ways to drain the battery down to safe levels.  I have heard
the lipos are 'safe' anywhere below 2V per cell, however, I figure as long
as I have something draining them, I just leave them on the load until they
are basically 'dead'.

 

For anything up to 3 cells, I use an automobile tail light bulb.  Just
solder 2 leads onto the bulb at the 2 contact points and clip the other ends
onto the battery leads.  For a 5 cell pack, I would use 2 bulbs in series.
Put them in a safe area, clip the bulbs on and leave them for a couple days.
Check the voltage from time to time and when it gets down to about zero,
just throw the battery in the trash.

 

I tried the salt water bath approach and it didn't do anything for me.
After a couple days, the voltage had declined very little so I took the
light bulb approach.  Actually anything that puts a load on the batteries
will work.  A large resistor, light bulb, old brushed motor, etc.

 

Don

 

In a message dated 8/30/2009 6:10:08 A.M. Pacific Daylight Time,
Snaproll4 at aol.com writes:

I have a Li-Po pack(5000) that needs to be thrown away.  It does not appear
to be physically damaged, but I need to know about the voltage.  How low
should I discharge it and I how do I do that?  My TP charger would take it
down to 3.3 volts/cell.

 

TIA.

 

Steve

 


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