[Elecraft] KX3 LiNiCo 12v 3.6 Ah Battery Pack

[Ignacy]

I use 3S1 of the older Li-Ion types in K2, 2 x 1.5A = 3A. I charge them
through 1A regulator set to 12.8V. The batteries are past 5 years and doing
well.  No balancing. The charge is enough to run a pileup a few hrs from
medium attractive places like TA , SV9 or KP2. 

I have new 4S LiFePO3 from batteryspace with 20A capacity
(http://www.batteryspace.com/LiFePO4-Prismatic-Box-Battery-12.8V-20Ah-256Wh-10C-rate-without-PCM.aspx).
No extra circuit. According to specs, the battery should be charged at 4x3.7
= 14.8V max. The batteryspace charger bought for this battery has 17V max.
Apparently nobody complains so LiFePO3 batteries must withstand more. I
fact, it takes very little current past 13.5V. I charge it with a 13.8V 28A
charger adjusting the voltage initially to have current < 15A. Then I max
the voltage to 14.4V. Seems to work really well. Full charge in 1.5 hrs. 

Ignacy

  

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