http://elecraft.85.s1.nabble.com/Li-ion-batteries-for-KX1-tp6295637p6296084.html
> Hi Phil:
>
> WA3WSJ has a nice page about the KX1, and has done just what you have in mind.
>
> See: <
http://www.wa3wsj.org/WA3WSJQRP.html>
>
> 73 de Ray
> K2ULR
> FN20kg
> Warrington, PA
>
>
> On Apr 21, 2011, at 5:40 PM, Phil Hystad wrote:
>
>> I have two questions regarding batteries used with KX1 in the internal battery pack.
>>
>> 1...has anyone used the 3.6 volt AA sized Li-ion battery in the KX1. I am thinking of a bank of six comprised of two strings in parallel. Each string is three 3.6 volt batteries in series. This gives approximately 11.4 volts or a little more (peak voltage of these cells are 4.2 volts). I presume that the battery pack might need to be reconfigured.
>>
>> 2...is there a consensus on the best, cost optimum versus performance, type of battery for the KX1? That is, alkaline versus, lithium (1.5 volt AA) versus anything else?
>>
>> Currently I used a smallish sealed lead acid battery. But it is a little bulky.
>>
>> 73, phil, K7PEH
>>
>> Sent from my iPad
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