Li poly's vs: Li Ions

[fishgod at pobox.mtaonline.net]

With my experience with Li-poly and Li-Ion I would have to assume that the
high current Li-poly's would be a better choice.  The standard Li-ions
cells are only good to 2c and that is putting a pretty healthy load on
them.  While the new high current Li-poly's are rated at 6C for 80% of the
capcity.  With the demands of digital servos I would think that the poly's
would be a better choice.  Of course I am no battery expert this is just
from my experience with small electric planes.

Michael Laggis
NSRCA 3618






Li-poly's work. They seem to work as well as Li-ons.  They are being sold
as RX packs as well as electric motor packs.
 
That being said, I have noticed that my Li-poly's drop off a little after
being fully charged, I have not yet tested how long they hold their charge
before they are used.
 
In the final analysis, if they work well, then they are lighter and thus
attractive to pattern players.
 
Regards,
 
Eric.
 
 
 -----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On
Behalf Of mike mueller
Sent: Monday, January 26, 2004 8:52 AM
To: discussion at nsrca.org
Subject: Li poly's vs: Li Ions


 Last year I ran a 2 cell 7.4  2000 mil. Li Ion pack in my plane. Since
then I've been building small E. planes and have gotten used to the newer
technology of Li poly's. My question to all you experts is should all my
new receiver battery packs from here on be Li Poly's? Does anyone see an
advantage or disadvantage to this. The setup I thought would be best was a
7.4v  2100 Mil 2S Thunder Power Li Poly with the appropriate 5.3 regulator
( what's your suggestion?) for 5 JR digital servos and a Jr pcm receiver.
If this has been asked before I apologize I just havn't seen it discussed.
Also I have a Triton charger so that's not an issue. Thanks, Mike


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