[Elecraft] KX3 KXBC3 and NiZN batteries

Rich rehill at ix.netcom.com
Wed Oct 17 10:28:04 EDT 2012


KX3 2135 is alive and well, and hungry for energy.  I'm feeding it with 
AA Alkaline batteries now, but am looking for a more permanent set of 
internal batteries.  I have a KXBC3 installed.

I'm considering low discharge1.2v  2500 mAH NiMH AAs because they may be 
recharged by the KXBC3.  Regular 2700 mAH NiMH AAs can lose as much as 
20% of their charge in the first 24 hours.  That drops their available 
power to about 2150 on the second day.  Low discharge seems a better path.

Also considering NiZn batteries.  Newer stabilized NiZN seem like a 
useful alternative.  Discharge curves seem similar to NiCd or NiMH, but 
they offer 1.65 nominal voltage.  I'm thinking the KXBC3 will not be a 
suitable charger.

I'm thinking that the 13v of the NiZN AA batteries will allow 10W output 
from the KX3, where the 9.6v of the NiMH only allows 5W output.

I also have 11.1 LiPo batteries I can use as external sources, but will 
likely consider a 4S1P 14.8v 25C LiPo as a potential external battery.

Anyone go through this exercise already?  I'm interested in comments.

Thanks.

-- 
Rich
NU6T



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